[PATCH] Make -fsanitize-coverage flag a core option so it's available via the clang-cl driver too

[Hans Wennborg]

lgtm


================
Comment at: test/Driver/fsanitize.c:238
@@ +237,2 @@
+// CLANG-CL-COVERAGE-NOT: unknown argument
+// CLANG-CL-COVERAGE: -fsanitize=address{{.*}}-fsanitize-coverage=1
----------------
Maybe split the last one into two lines to avoid the {{.*}}? My first thought was hmm, what's that regex supposed to match.

http://reviews.llvm.org/D8663

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