make: Remove 'res_features' from libraries to link against with cygwin/mingw32

make: Remove 'res_features' from libraries to link against with cygwin/mingw32

Both the apps and channels Makefiles still listed 'res_features' as modules to
link against when compiling for cygwin or mingw32. This module hasn't existed
for quite some time.

ASTERISK-18105 #close
Reported by: feyfre
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Merged revisions 432341 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 432342 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@432343 65c4cc65-6c06-0410-ace0-fbb531ad65f3