PR16715: Fix assert in verifier: only mark call to 'operator new' as 'builtin' if
corresponding 'operator new' was actually emitted as a function marked 'nobuiltin'.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187374 91177308-0d34-0410-b5e6-96231b3b80d8
Make this test not try to write on object file and test all of the
output rather than just part of it.

Also, remove the frighteningly ancient comment about not working with
the gcc-driver. (!!!)

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187376 91177308-0d34-0410-b5e6-96231b3b80d8