Don't build tests in libass when Xcompiling.

extras/contrib/src/Makefile

@@ -2468,7 +2468,7 @@ libass: libass-$(ASS_VERSION).tar.bz2
 	patch -p0 < Patches/libass_mplayer_updates.patch
 ifneq ($(HOST),$(BUILD))
 	patch -p0 < Patches/libass-cross.patch
-	cd $@; autoconf
+	cd $@; autoconf; automake
 endif
 
 .libass: libass .png

extras/contrib/src/Patches/libass-cross.patch

@@ -12,3 +12,11 @@
  AC_FUNC_STAT
  AC_FUNC_STRTOD
  AC_FUNC_VPRINTF
+--- libass/Makefile.am.old	2008-08-12 08:55:47.000000000 +0200
++++ libass/Makefile.am	2008-08-12 08:56:05.000000000 +0200
+@@ -4,4 +4,4 @@
+ pkgconfigdir = $(libdir)/pkgconfig
+ pkgconfig_DATA = libass.pc
+ 
+-SUBDIRS = libass test
++SUBDIRS = libass