Dodge an android-gtest build issue with "clone"
Dodge an android-gtest build issue with "clone"

Supposed to be handled (gingerbread and up should have clone), but
CrystaX as we're using it right now doesn't seem to have it, and we
don't need the functionality anyway, so easier to disable it.

godbyk/OSVR-Core,godbyk/OSVR-Core,godbyk/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core