Fix the memcpy test to make sure we don't inline/build-in the call

git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@1822 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5
Drop -Xclang from the test run command now that clang-cl supports -fsanitize=address directly

git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@1823 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5