[sanitizer] Test ubsan and cfi on android.

Summary:
Enable check-cfi and check-ubsan on Android.
Check-ubsan includes standalone and ubsan+asan, but not tsan or msan.
Cross-dso cfi tests are disabled for now.

Reviewers: vitalybuka, pcc

Subscribers: srhines, kubamracek, llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D38608

llvm-svn: 315105