clang/test: Drop "REQUIRES:shell" in three tests. They can run on win32.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@173419 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Index/crash-recovery-*.c: Drop 'REQUIRES:shell". "test !" is available on Lit win32 since r173421.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@173422 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Driver/output-file-cleanup.c: Mark it as XFAIL:*-mingw32, ppc, for now.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@173428 91177308-0d34-0410-b5e6-96231b3b80d8