chmod +x before running a gtest on the target
chmod +x before running a gtest on the target

otherwise binaries written by flashing userdata.img cannot be run.

Change-Id: I495ca3cde4e5d7cbdf6b535b5d38345da4846e90

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