Include moldname contents in msvcrt.def

Add .def alias for isascii, iscsym, iscsymf, toascii, strcasecmp, strncasecmp and wcscmpi

Make libmoldname.a be an empty library

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@5807 4407c894-4637-0410-b4f5-ada5f102cad1