SDL2_image: disable dynamic loading of libraries

We declare the libraries as dependencies of the package anyway, so there
is no need for this dynamic load support. The runtime loader does a
better job at it.

media-libs/sdl2_image/sdl2_image-2.0.0.recipe

@@ -9,7 +9,7 @@ on both libz and libjpeg.
 HOMEPAGE="http://www.libsdl.org/projects/SDL_image" 
 SRC_URI="https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.0.tar.gz"
 CHECKSUM_SHA256="b29815c73b17633baca9f07113e8ac476ae66412dec0d29a5045825c27a47234"
-REVISION="3"
+REVISION="4"
 LICENSE="Zlib"
 COPYRIGHT="1997-2013 Sam Lantinga"
 
@@ -67,7 +67,8 @@ BUILD()
 	aclocal --install -I acinclude
 	autoconf
 	dos2unix miniz.h
-	runConfigure ./configure
+	runConfigure ./configure --enable-jpg-shared=false --enable-png-shared=false \
+		--enable-tif-shared=false --enable-webp-shared=false
 	make $jobArgs
 }