Fix package path of android/soong/android pctx

android/soong/common was renamed to android/soong/android long
ago, but the pctx package path was still "android/soong/common".
This required all users of rules defined in android/soong/android
to import "android/soong/android" and then
pctx.Import("android/soong/common").

Test: m checkbuild
Change-Id: I20d096522760538f7cfc2bec3d4bfeba99b275d4
diff --git a/cmd/soong_env/soong_env.go b/cmd/soong_env/soong_env.go
index 933e525..d305d83 100644
--- a/cmd/soong_env/soong_env.go
+++ b/cmd/soong_env/soong_env.go
@@ -15,7 +15,7 @@
 // soong_glob is the command line tool that checks if the list of files matching a glob has
 // changed, and only updates the output file list if it has changed.  It is used to optimize
 // out build.ninja regenerations when non-matching files are added.  See
-// android/soong/common/glob.go for a longer description.
+// android/soong/android/glob.go for a longer description.
 package main
 
 import (