Add CL 42410 to this R25 branch

BUG=None
TEST=local entry into chroot

Change-Id: I62107b92e6ef4f4aeb604b6dcf9a7008553642e9
Reviewed-on: https://gerrit.chromium.org/gerrit/43324
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
diff --git a/sdk_lib/enter_chroot.sh b/sdk_lib/enter_chroot.sh
index 23078ff..2e09c32 100755
--- a/sdk_lib/enter_chroot.sh
+++ b/sdk_lib/enter_chroot.sh
@@ -82,6 +82,7 @@
   .gdata_cred.txt             # User/password for Google Docs on chromium.org
   .gdata_token                # Auth token for Google Docs on chromium.org
   .disable_build_stats_upload # Presence of file disables command stats upload
+  .netrc                      # May contain required source fetching credentials
 )
 
 INNER_CHROME_ROOT=$FLAGS_chrome_root_mount  # inside chroot