Revert "Do coverage build without ASan."
Revert "Do coverage build without ASan."

This reverts commit bc10f9d4a31640e1a7b87e873b68b4e7a2229ddb.

Encountered some cases where coverage builds hit stack overflows that
did not occur with ASan enabled. This prevented us from recording
coverage information for the first corpus containing the problematic
input.

google/fuzzer-test-suite,google/fuzzer-test-suite,google/fuzzer-test-suite