[Driver] Consider -fno-sanitize=... state when filtering out -fsanitize-coverage=...

The driver ignores -fsanitize-coverage=... flags when also given
-fsanitize=... flags for sanitizer flavors that don't support the
coverage runtime. This logic failed to account for subsequent
-fno-sanitize=... flags that disable the sanitizer flavors that
conflict with -fsanitize-coverage=... flags.

Patch by Roland McGrath

Differential Revision: https://reviews.llvm.org/D35603

llvm-svn: 308707