contrib: libass added fontconfig font search paths for OS X.

On OS X, fontconfig searches font only from /System/Library/Fonts, so this patch adds more search paths to its initialization.
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>
(cherry picked from commit 6bad0899ef262508992233fb12c35578f10165d5)

contrib/src/ass/ass-macosx.patch

+--- libass/libass/ass_fontconfig.c	2011-09-01 23:26:35.000000000 +0200
++++ libass-fixed/libass/ass_fontconfig.c	2012-09-01 14:34:17.000000000 +0200
+@@ -442,6 +442,11 @@
+                 "file found, using fallback.");
+         FcConfigDestroy(priv->config);
+         priv->config = FcInitLoadConfig();
++#ifdef __APPLE__
++        FcConfigAppFontAddDir(priv->config, "~/Library/Fonts");
++        FcConfigAppFontAddDir(priv->config, "/Library/Fonts");
++        FcConfigAppFontAddDir(priv->config, "/Network/Library/Fonts");
++#endif
+         rc++;
+     }
+     if (rc && update) {

contrib/src/ass/rules.mak

@@ -14,6 +14,9 @@ $(TARBALLS)/libass-$(ASS_VERSION).tar.gz:
 
 libass: libass-$(ASS_VERSION).tar.gz .sum-ass
 	$(UNPACK)
+ifdef HAVE_MACOSX
+	$(APPLY) $(SRC)/ass/ass-macosx.patch
+endif
 	$(MOVE)
 
 DEPS_ass = freetype2 $(DEPS_freetype2) fontconfig $(DEPS_fontconfig) fribidi