Wipe local_manifest.xml if it exists.

If we control the repository, we don't want local_manifest.xml screwing
with us.

BUG=None
TEST=manual

Change-Id: I1cc6c88052162aef9206f437fb93af26d22748c0
Reviewed-on: https://gerrit.chromium.org/gerrit/33391
Tested-by: Brian Harring <ferringb@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Ready: Brian Harring <ferringb@chromium.org>
1 file changed