Add rcgrep for searching init.rc style files.

Change-Id: Iece26217a7c59c7b2fd1bf19a7edccbe4be92947
diff --git a/envsetup.sh b/envsetup.sh
index a38f20a..ec20bc17 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1102,6 +1102,11 @@
     find . -name .repo -prune -o -name .git -prune -o -path ./out -prune -o -name sepolicy -type d -print0 | xargs -0 grep --color -n -r --exclude-dir=\.git "$@"
 }
 
+function rcgrep()
+{
+    find . -name .repo -prune -o -name .git -prune -o -name out -prune -o -type f -name "*\.rc*" -print0 | xargs -0 grep --color -n "$@"
+}
+
 case `uname -s` in
     Darwin)
         function mgrep()