Revert 'Start small, only try to test ARM on ARM RT bot'

Revert commit 219111, since we now only test ARM ASAN tests when
the target is ARM (and same for AArch32 and AArch64).



git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@219305 91177308-0d34-0410-b5e6-96231b3b80d8