net/freeswitch: Mark broken for 2 reasons

reason 1: Unfetchable (checksum mismatch)
reason 2: attempts to strip libfreeswitch.a

libtool: install: /usr/bin/install -c .libs/libfreeswitch.a \

/wrkdirs/usr/ports/net/freeswitch/work/stage/usr/local/lib/libfreeswitch.a

libtool: install: strip --strip-debug \

/wrkdirs/usr/ports/net/freeswitch/work/stage/usr/local/lib/libfreeswitch.a

strip: file format not recognized
gmake[3]: *** [Makefile:1205: install-libLTLIBRARIES] Error 1
gmake[3]: Leaving directory '/wrkdirs/usr/ports/net/freeswitch/work/freeswitch-1.6.8'