Fix missing link line for libgtest_host.
Fix missing link line for libgtest_host.

bug 13435344

Change-Id: If4197ddb97b235c731e4c771968eae46483d55b3

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst