Fix up GTMSenTestCase so that it pulls in SenTestingKit on Xcode < 5.
Fix up GTMSenTestCase so that it pulls in SenTestingKit on Xcode < 5.

DELTA=2 (1 added, 0 deleted, 1 changed)
DELTA_BY_EXTENSION=h=2
qokelate/google-toolbox-for-mac,qokelate/google-toolbox-for-mac,qokelate/google-toolbox-for-mac