contrib: fix libshout build on FreeBSD 8

contrib/src/shout/bsd.patch

+--- libshout.orig/src/net/sock.c	2012-10-04 13:04:55.000000000 +0200
++++ libshout/src/net/sock.c	2012-10-04 13:05:18.000000000 +0200
+@@ -22,6 +22,10 @@
+  #include <config.h>
+ #endif
+ 
++#ifdef __FreeBSD__
++# define __BSD_VISIBLE 1
++#endif
++
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <stdarg.h>

contrib/src/shout/rules.mak

@@ -19,6 +19,7 @@ $(TARBALLS)/libshout-$(SHOUT_VERSION).tar.gz:
 libshout: libshout-$(SHOUT_VERSION).tar.gz .sum-shout
 	$(UNPACK)
 	$(APPLY) $(SRC)/shout/libshout-win32.patch
+	$(APPLY) $(SRC)/shout/bsd.patch
 	$(UPDATE_AUTOCONFIG)
 	$(MOVE)