Make MC use Windows COFF on Windows and add tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109494 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Scripts/coff-dump.py.bat b/test/Scripts/coff-dump.py.bat
new file mode 100644
index 0000000..cc83eba
--- /dev/null
+++ b/test/Scripts/coff-dump.py.bat
@@ -0,0 +1,4 @@
+@echo off
+
+%PYTHON_EXECUTABLE% %LLVM_SRC_ROOT%\test\Scripts\coff-dump.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+