Add merged patches to commit title in merge-to-branch.

This makes it easier to grep for patches in title in the revision history.

This also removes the redundant information into which branch was merged, as this can be derived from the version number in the title now.

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/223753002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20482 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix bug entry and quotation marks in merge-to-branch.

This fixes usage of quotation marks inside titles of merged patches.
This also fixes aggregation of empty or "none" BUG entries.

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/223463003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20483 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge