[noupstream] Add codereview.settings for GCC repo

BUG=none
TEST=git clone http://git.chromium.org/git/nacl-gcc.git && cd nacl-gcc && ... && git-cl upload # in your branch

Review URL: http://codereview.chromium.org/6596033
diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..635c685
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,5 @@
+# This file is used by git-cl to get repository specific information.
+CODE_REVIEW_SERVER: codereview.chromium.org
+CC_LIST: native-client-reviews@googlegroups.com
+STATUS: http://nativeclient-status.appspot.com/status
+VIEW_VC: http://git.chromium.org/gitweb/?p=nacl-gcc.git;a=commit;h=