Windows Batch files should have DOS end-of-line markers.

Also added the file with -crlf in a .gitattributes file so
It's not converted back for people with autocrlf=true.

Signed-off-by: Marius Storm-Olsen <mstormo_git@storm-olsen.com>

.gitattributes

@@ -0,0 +1 @@
+msys.bat -crlf