Also resolve a long-working FIXME in the test case I modified.

llvm-svn: 102688

 - This is designed to make it obvious that %clang_cc1 is a "test variable"
   which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it
   can be useful to redefine what gets run as 'clang -cc1' (for example, to set
   a default target).

llvm-svn: 91446

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602

llvm-svn: 54850

llvm-svn: 39786

llvm-svn: 39612

llvm-svn: 39285