[libfuzzer] Removing coverage-related flags from asan options.

Summary:
Reasons to remove are twofold:
 - we don't really need coverage=1 for libfuzzer operation
 - makes controlling coverage for fuzzer processes non-trivial.

Differential Revision: http://reviews.llvm.org/D17168

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260611 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed