r: add stuff for scratch

Change-Id: I2ffb3f6828cbb035105069f49de16c46d7f28ae4
Reviewed-on: https://go-review.googlesource.com/3613
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/r/greeting.go b/r/greeting.go
new file mode 100644
index 0000000..9863801
--- /dev/null
+++ b/r/greeting.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func greeting() {
+	fmt.Println("hello, git")
+}
diff --git a/r/main.go b/r/main.go
new file mode 100644
index 0000000..3ed81c5
--- /dev/null
+++ b/r/main.go
@@ -0,0 +1,5 @@
+package main
+
+func main() {
+	greeting()
+}