remove -mno-cygwin

Motofumi Oka <[email protected]> Wed, 14 Sep 2011 23:48:13 +0900
Newsgroups gmane.comp.video.xvid.devel
Message-ID <CACp0aOem2udaoQM+CMSixK1CMzGro9gLzamnfArysr_Uw_i+fA@mail.gmail.com>
I tried compiling xvidcore with and GCC(4.5.3) on Cygwin(1.7.9), and got
failed with a message as follows.

"gcc: The -mno-cygwin flag has been removed; use a mingw-targeted
cross-compiler."

Cygwin-devs decided that -mno-cygwin was not supported any longer.
http://www.cygwin.com/ml/cygwin-announce/2008-09/msg00005.html

so, -mno-cygwin flags should be removed from configure.in.