Added patch for sdl_mixer-1.2.12 so that it skips building playwave and playmus

media-libs/sdl_mixer/sdl_mixer-1.2.12.recipe

@@ -44,6 +44,7 @@ BUILD_PREREQUIRES="
 	haiku${secondaryArchSuffix}_devel >= $haikuVersion
 	cmd:aclocal
 	cmd:autoconf
+	cmd:automake
 	cmd:gcc$secondaryArchSuffix
 	cmd:ld$secondaryArchSuffix
 	cmd:libtool
@@ -56,6 +57,8 @@ BUILD_PREREQUIRES="
 
 SOURCE_DIR="SDL_mixer-$portVersion"
 
+PATCHES="sdl_mixer-1.2.12.patch"
+
 BUILD()
 {
 	libtoolize --force --copy --install