common.sh: move fix_broken_symlinks out

Only one user of this is left, so move it to the respective script.

BUG=None
TEST=CQ passes

Change-Id: Ibd3e7bb3244f38e5a6af548a3a0f9d620d8fe6d3
Reviewed-on: https://chromium-review.googlesource.com/1764951
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
2 files changed