2015: add OMIT build tags to example files

Change-Id: Ifacb2136cc969c0f4f5610afae6be699cdc96dee
Reviewed-on: https://go-review.googlesource.com/9871
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/2015/go-for-java-programmers/builtin.go b/2015/go-for-java-programmers/builtin.go
index fa84ac1..800a193 100644
--- a/2015/go-for-java-programmers/builtin.go
+++ b/2015/go-for-java-programmers/builtin.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/closure.go b/2015/go-for-java-programmers/closure.go
index cf8ddc1..5958c1e 100644
--- a/2015/go-for-java-programmers/closure.go
+++ b/2015/go-for-java-programmers/closure.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/error.go b/2015/go-for-java-programmers/error.go
index 6475a38..92ebe21 100644
--- a/2015/go-for-java-programmers/error.go
+++ b/2015/go-for-java-programmers/error.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/frontend.go b/2015/go-for-java-programmers/frontend.go
index 9d20788..16d744a 100644
--- a/2015/go-for-java-programmers/frontend.go
+++ b/2015/go-for-java-programmers/frontend.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 // The server program issues Google search requests. It serves on port 8080.
 //
 // The /search endpoint accepts these query params:
diff --git a/2015/go-for-java-programmers/func.go b/2015/go-for-java-programmers/func.go
index 3c7a11f..c273fa3 100644
--- a/2015/go-for-java-programmers/func.go
+++ b/2015/go-for-java-programmers/func.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/gofmt-after.go b/2015/go-for-java-programmers/gofmt-after.go
index 41a1407..4d41a57 100644
--- a/2015/go-for-java-programmers/gofmt-after.go
+++ b/2015/go-for-java-programmers/gofmt-after.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/goimports-after.go b/2015/go-for-java-programmers/goimports-after.go
index d31d69c..398621d 100644
--- a/2015/go-for-java-programmers/goimports-after.go
+++ b/2015/go-for-java-programmers/goimports-after.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/goimports-before.go b/2015/go-for-java-programmers/goimports-before.go
index cec4f48..ee9303a 100644
--- a/2015/go-for-java-programmers/goimports-before.go
+++ b/2015/go-for-java-programmers/goimports-before.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 func main() {
diff --git a/2015/go-for-java-programmers/hello/hello.go b/2015/go-for-java-programmers/hello/hello.go
index 429f248..1725b6e 100644
--- a/2015/go-for-java-programmers/hello/hello.go
+++ b/2015/go-for-java-programmers/hello/hello.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/hello/server.go b/2015/go-for-java-programmers/hello/server.go
index e768548..a9da549 100644
--- a/2015/go-for-java-programmers/hello/server.go
+++ b/2015/go-for-java-programmers/hello/server.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/interface.go b/2015/go-for-java-programmers/interface.go
index c82cf28..efef67e 100644
--- a/2015/go-for-java-programmers/interface.go
+++ b/2015/go-for-java-programmers/interface.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/method.go b/2015/go-for-java-programmers/method.go
index 5dc4ca4..230c47f 100644
--- a/2015/go-for-java-programmers/method.go
+++ b/2015/go-for-java-programmers/method.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go-for-java-programmers/panic.go b/2015/go-for-java-programmers/panic.go
index f9f0a21..6ae78e8 100644
--- a/2015/go-for-java-programmers/panic.go
+++ b/2015/go-for-java-programmers/panic.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/pointer.go b/2015/go-for-java-programmers/pointer.go
index e273125..05a69af 100644
--- a/2015/go-for-java-programmers/pointer.go
+++ b/2015/go-for-java-programmers/pointer.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/safe.go b/2015/go-for-java-programmers/safe.go
index 4186f42..68e1136 100644
--- a/2015/go-for-java-programmers/safe.go
+++ b/2015/go-for-java-programmers/safe.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go-for-java-programmers/struct.go b/2015/go-for-java-programmers/struct.go
index 4abbff4..da025c2 100644
--- a/2015/go-for-java-programmers/struct.go
+++ b/2015/go-for-java-programmers/struct.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go4cpp/badcounter.go b/2015/go4cpp/badcounter.go
index 92b8eb7..cd201dd 100644
--- a/2015/go4cpp/badcounter.go
+++ b/2015/go4cpp/badcounter.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go4cpp/defer.go b/2015/go4cpp/defer.go
index 05f7cc6..11536b8 100644
--- a/2015/go4cpp/defer.go
+++ b/2015/go4cpp/defer.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go4cpp/diamond.go b/2015/go4cpp/diamond.go
index 1d1b96f..665a5f5 100644
--- a/2015/go4cpp/diamond.go
+++ b/2015/go4cpp/diamond.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go4cpp/embedding.go b/2015/go4cpp/embedding.go
index 6bf08ef..f7fae6c 100644
--- a/2015/go4cpp/embedding.go
+++ b/2015/go4cpp/embedding.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import "fmt"
diff --git a/2015/go4cpp/mock.go b/2015/go4cpp/mock.go
index 86ddb85..c74d029 100644
--- a/2015/go4cpp/mock.go
+++ b/2015/go4cpp/mock.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go4cpp/sizes.go b/2015/go4cpp/sizes.go
index 98fe2d5..329a174 100644
--- a/2015/go4cpp/sizes.go
+++ b/2015/go4cpp/sizes.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (
diff --git a/2015/go4cpp/webserver.go b/2015/go4cpp/webserver.go
index bcd9075..b8cccce 100644
--- a/2015/go4cpp/webserver.go
+++ b/2015/go4cpp/webserver.go
@@ -1,3 +1,5 @@
+// +build OMIT
+
 package main
 
 import (