[asan] Resurrect sanitize-coverage test on Android.

The test got silently disabled because of a typo in the lit config.
Also, compiler flags have changed (asan-coverage -> fsanitize-coverage).


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@224569 91177308-0d34-0410-b5e6-96231b3b80d8