Re-enable ASAN/UBSAN tests on ARM, with VFP3 they began to pass

When compiling with -mfpu=vfpv3, those tests began to pass, like the others
with "Illegal Instruction" error, so removing the XFAIL from them should
get the bot green (and have more tests!).

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@219721 91177308-0d34-0410-b5e6-96231b3b80d8