[Author: thomasvl]

Fix up one compile warning found by Xcode.
Use the newer directive to fix up the unittest bundle ids (flagged by
  newer Xcodes).
Force the deployment version to 10.5 to avoid a bunch of the color sync
  dep. notices.

R=dmaclach
DELTA=7  (2 added, 0 deleted, 5 changed)

git-svn-id: http://google-toolbox-for-mac.googlecode.com/svn/trunk@595 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3