verity: Updating common.mk to ToT to enable profiling

This update replaces the current common.mk used in this project with the newest
version. This will allow all of the common.mk based projects to be on the same
version for debugging and enables profiling support.

BUG=chromium-os:37854
TEST=Exectuted the following commands to confirm the build works:
     MODE=profiling cros_workon_make --board=link
     MODE=profiling cros_workon_make --board=link --test
     cros_workon_make --board=link
     cros_workon_make --board=link --test
     Repeated these with emerge-link, USE=profiling, and
     FEATURES=test as need.
     For the emerge command with profiling and testing enable, confirmed the
     appropriate coverage files were created in /usr/share/profiling/...

Change-Id: I5b1dd04e8eec9b1320ee8d9945a87a9f45c61c20
Reviewed-on: https://gerrit.chromium.org/gerrit/42781
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Tested-by: Ryan Harrison <rharrison@chromium.org>
2 files changed