[PATCH] clang-cl: Don't treat linker input files differently when /TP or /TC is specified.

[Hans Wennborg]

lgtm with nits addressed.

================
Comment at: lib/Driver/Driver.cpp:1080
@@ +1079,3 @@
+        if (!InputTypeArg->getOption().matches(options::OPT_x)) {
+          // If emulating cl.exe, make sure that -TC and -TP don't affect input
+          // object files.
----------------
Nit: I think we've usually spelled the cl.exe style options with slashes in comments.

================
Comment at: test/Driver/cl-inputs.c:39
@@ +38,3 @@
+// TPlib: warning: cl-test.lib: 'linker' input unused
+// TPlib-NOT: cl-test.lib
+
----------------
This should warn that /TP is unused. I'd add a check for that.

http://reviews.llvm.org/D5334