go.sys: use golang.org/x/... import paths

LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/171050043
diff --git a/plan9/syscall_test.go b/plan9/syscall_test.go
index 9b8c7da..8f829ba 100644
--- a/plan9/syscall_test.go
+++ b/plan9/syscall_test.go
@@ -9,7 +9,7 @@
 import (
 	"testing"
 
-	"code.google.com/p/go.sys/plan9"
+	"golang.org/x/sys/plan9"
 )
 
 func testSetGetenv(t *testing.T, key, value string) {
diff --git a/unix/creds_test.go b/unix/creds_test.go
index 0348536..30694a0 100644
--- a/unix/creds_test.go
+++ b/unix/creds_test.go
@@ -13,7 +13,7 @@
 	"syscall"
 	"testing"
 
-	"code.google.com/p/go.sys/unix"
+	"golang.org/x/sys/unix"
 )
 
 // TestSCMCredentials tests the sending and receiving of credentials
diff --git a/unix/mksyscall_solaris.pl b/unix/mksyscall_solaris.pl
index 68f3f6a..e8ec976 100755
--- a/unix/mksyscall_solaris.pl
+++ b/unix/mksyscall_solaris.pl
@@ -265,7 +265,7 @@
 import "unsafe"
 EOF
 
-print "import \"code.google.com/p/go.sys/unix\"\n" if $package ne "unix";
+print "import \"golang.org/x/sys/unix\"\n" if $package ne "unix";
 
 print <<EOF;
 
diff --git a/unix/mmap_unix_test.go b/unix/mmap_unix_test.go
index 5dfa75d..04d5720 100644
--- a/unix/mmap_unix_test.go
+++ b/unix/mmap_unix_test.go
@@ -9,7 +9,7 @@
 import (
 	"testing"
 
-	"code.google.com/p/go.sys/unix"
+	"golang.org/x/sys/unix"
 )
 
 func TestMmap(t *testing.T) {
diff --git a/unix/syscall_bsd_test.go b/unix/syscall_bsd_test.go
index 9c081d7..55d8843 100644
--- a/unix/syscall_bsd_test.go
+++ b/unix/syscall_bsd_test.go
@@ -9,7 +9,7 @@
 import (
 	"testing"
 
-	"code.google.com/p/go.sys/unix"
+	"golang.org/x/sys/unix"
 )
 
 const MNT_WAIT = 1
diff --git a/unix/syscall_test.go b/unix/syscall_test.go
index 7306345..9c57d9c 100644
--- a/unix/syscall_test.go
+++ b/unix/syscall_test.go
@@ -9,7 +9,7 @@
 import (
 	"testing"
 
-	"code.google.com/p/go.sys/unix"
+	"golang.org/x/sys/unix"
 )
 
 func testSetGetenv(t *testing.T, key, value string) {
diff --git a/unix/syscall_unix_test.go b/unix/syscall_unix_test.go
index 87f992a..ad9a5d7 100644
--- a/unix/syscall_unix_test.go
+++ b/unix/syscall_unix_test.go
@@ -18,7 +18,7 @@
 	"testing"
 	"time"
 
-	"code.google.com/p/go.sys/unix"
+	"golang.org/x/sys/unix"
 )
 
 // Tests that below functions, structures and constants are consistent
diff --git a/windows/syscall_test.go b/windows/syscall_test.go
index e54a03c..62588b9 100644
--- a/windows/syscall_test.go
+++ b/windows/syscall_test.go
@@ -9,7 +9,7 @@
 import (
 	"testing"
 
-	"code.google.com/p/go.sys/windows"
+	"golang.org/x/sys/windows"
 )
 
 func testSetGetenv(t *testing.T, key, value string) {
diff --git a/windows/syscall_windows_test.go b/windows/syscall_windows_test.go
index 85500a6..0462bcf 100644
--- a/windows/syscall_windows_test.go
+++ b/windows/syscall_windows_test.go
@@ -11,7 +11,7 @@
 	"syscall"
 	"testing"
 
-	"code.google.com/p/go.sys/windows"
+	"golang.org/x/sys/windows"
 )
 
 func TestWin32finddata(t *testing.T) {