Mark a sancov test as unsupported on x86_64h-darwin
Failing bot:
// Tests -fsanitize-coverage=inline-8bit-counters
//
// REQUIRES: has_sancovcc,stable-runtime
-// UNSUPPORTED: i386-darwin, x86_64-darwin
+// UNSUPPORTED: i386-darwin, x86_64-darwin, x86_64h-darwin
//
// RUN: %clangxx -O0 %s -fsanitize-coverage=inline-8bit-counters 2>&1
