Remove gtest subdir from tests Makefile.am
Remove gtest subdir from tests Makefile.am

 o We have a system wide install of gtest, we don't need to build it
   in libwcl.

WearableComputerLab/LibWCL,WearableComputerLab/LibWCL,WearableComputerLab/LibWCL,WearableComputerLab/LibWCL