blink_rename_merge_helper: package clang includes as well.

Without this, the clang tool will complain about missing headers from
the standard library. On Mac, this includes libc++ as well.

BUG=676588
[email protected]

Review-Url: https://codereview.chromium.org/2806033003 .
Cr-Commit-Position: refs/heads/master@{#463073}
1 file changed