[asan] Switch asan-android tests from arm to armv7.

Workaround for https://code.google.com/p/android/issues/detail?id=68779.


git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@222836 91177308-0d34-0410-b5e6-96231b3b80d8