Disable asan instrumentation for StackGrowsDown().

src/gtest-death-test.cc

@@ -985,6 +985,8 @@ void StackLowerThanAddress(const void* ptr, bool* result) {
   *result = (&dummy < ptr);
 }
 
+// Make sure AddressSanitizer does not tamper with the stack here.
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
 bool StackGrowsDown() {
   int dummy;
   bool result;