patch-cc (configure.in): Merged with patch-ch.
patch-af (src/unexfreebsd.c): Removed. Not used by this port.
patch-ca (src/Makefile.in): Removed. 5-CURRENT's and
4-STABLE's libtermcap -> libncurses symbolic link issues
are now well handled by vendor's src/s/freebsd.h.
Moved LIBS_XPG changes to patch-cb.
patch-cb (src/s/freebsd.h): Regenerate for emacs-20.7.
Update the conditional of enclosing the USE_XPG check
so as not to link libxpg4 on recently 5-CURRENT and
4-STABLE after the merge of libxpg4 into libc.
Added LIBS_XPG to LIBS_SYSTEM.
PR: ports/19653
Submitted by: OKAZAKI Tetsurou <okazaki@be.to>
