build: improve DVB check

A use of NO_STREAM_ID_FILTER was added to the DVB code recently. While I
have no idea what it's needed for, it makes mpv fail to compile on
FreeBSD 10.1. Add it to the dvb configure check.

waftools/fragments/dvb.c

@@ -7,4 +7,4 @@
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/video.h>
 #include <linux/dvb/audio.h>
-int main(void) {return 0;}
+int main(void) {int a = NO_STREAM_ID_FILTER; return 0;}