[test] Tweak driver test from r353917 and r353922 to pass with a nondefault CLANG_DEFAULT_LINKER

Force -fuse-ld=ld, as some other tests in the same file do.

Loosen the regex matching the linker tool name as well, as this
can end up being <triple>-ld in case such a named tool exists.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@353946 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed