[asan] Fix coverage-android test to avoid name conflict.

And re-enable it.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@210646 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] One more coverage test.

Test that coverage is dumped correctly (and completely) even when the processed
gets SIGKILL-ed.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@210647 91177308-0d34-0410-b5e6-96231b3b80d8