Fix borked tests after r23354.

TBR=vogelheim@chromium.org
TEST=cctest/test-run-inlining

Review URL: https://codereview.chromium.org/505753002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23356 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Teach v8rel script to read git hashes from DEPS.

The chromium DEPS file can refer to v8 git hashes now. These
are converted back into svn revision numbers for the v8
releases spreadsheet.

The DEPS file's quotation mark policy changed which affects
the regexp for retrieving the v8 revision ("->').

TEST=script_test.py
TEST=tools/push-to-trunk/releases.py -c /path/to/chromium/src --branch recent
R=hinoka@google.com

Review URL: https://codereview.chromium.org/500023003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23357 ce2b1a6d-e550-0410-aec6-3dcde31c8c00