Add missing mojo_utility_unittests target to mojob.sh

Also sort the unit tests in alphabetical order so it is easier to add
new targets.

BUG=None
TEST=./mojo/tools/mojob.sh test, verifies it also runs
mojo_utility_unittests
TBR=darin@chromium.org,viettrungluu@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/115573003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240813 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240813