[MPlayer-cygwin] binary codecs dir in mplayer-mingw32

[Sascha Sommer]

> i've some ideas which may get useful to place binary codecs.
> mplayer directly call loadlibrarya on mingw32,and the function search
order is exe-dir--->currect dir---->system dir--->windows dir---->path
according to msdn.
> so it's better to put rp9win32,win32codecs,etc'file into mplayer.exe's
directory,or put all into a single dir and add it to path.while adding to
system dir may override some exist dll.

That is why you can put them into the codecs subdirectory of the mplayer
mingw packages. MPlayer will
add this dir to the path. This works for all except the quicktime codecs.

Sascha