Mojo: mojob.sh: on sync, run hooks but not gyp

Because we need hooks to do a bunch of things.

R=ben@chromium.org
NOTRY=True

Review URL: https://codereview.chromium.org/103123004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238506 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238506