pre-upload: Add a check for tabbed indents for ebuild,eclass.

I have :set expandtab in vim. Maybe you do too!
ebuild/eclass files want tabbed indents. So let's catch that in
pre-upload rather than annoying reviewers.

BUG=chromium:676699
TEST=(1) (new) unittest.
     (2) Upload a CL in some ebuild/eclass with/without space indent.

Change-Id: If9d9b3e3cfd253960a1d593e9374b4e8664bc8c8
Reviewed-on: https://chromium-review.googlesource.com/423003
Commit-Ready: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
2 files changed