contrib: add libass

contrib/src/ass/SHA512SUMS

+345b5138875a31bce4f08bd378ab064d01b26cb51df2010056970158e8f845519f4aedebb0e0609200781e9e28e000ceba17b30e81ba5925f97499b09347e461  libass-0.9.12.tar.gz

contrib/src/ass/rules.mak

+# ASS
+ASS_VERSION := 0.9.12
+ASS_URL := http://libass.googlecode.com/files/libass-$(ASS_VERSION).tar.gz
+
+PKGS += ass
+
+$(TARBALLS)/libass-$(ASS_VERSION).tar.gz:
+	$(call download,$(ASS_URL))
+
+.sum-ass: libass-$(ASS_VERSION).tar.gz
+
+libass: libass-$(ASS_VERSION).tar.gz .sum-ass
+	$(UNPACK)
+	$(MOVE)
+
+#TODO .fontconfig
+
+.ass: libass .freetype2
+	#cd $< && autoreconf -fiv
+	cd $< && $(HOSTVARS) CFLAGS="$(CFLAGS) -O3" ./configure $(HOSTCONF) --disable-png --disable-enca
+	cd $< && $(MAKE) install
+	touch $@