Cleanup: fix names of recipe and patch files.

* this fixes the wrong recipe names introduced by myself in #d525fee
* adjust patch names to match corresponding recipes
* additionally: create 'additional-files' folders as hint to some
  ports that do not have a proper recipe yet

media-libs/sdl_image/sdl_image-1.2.12.recipe

@@ -0,0 +1,37 @@
+DESCRIPTION="Simple Direct Media Layer Image Library" 
+HOMEPAGE="http://www.libsdl.org/projects/SDL_image" 
+SRC_URI="http://www.libsdl.org/projects/SDL_image/release/SDL_image-1.2.12.tar.gz"
+CHECKSUM_MD5="a0f9098ebe5400f0bdc9b62e60797ecb"
+REVISION="1"
+STATUS_HAIKU="stable"
+DEPEND="media-libs/libsdl >= 1.2.14
+        media-libs/jpeg >= 8b
+        media-libs/libpng >= 1.2.46
+        media-libs/tiff >= 3.8.2
+        media-libs/giflib >= 4.1.6
+        media-libs/libwebp >= 0.1.3"
+BUILD()
+{
+	cd SDL_image-1.2.12
+	libtoolize --force --copy --install
+	aclocal --install -I acinclude
+	./autogen.sh
+	MANDIR=`finddir B_COMMON_DOCUMENTATION_DIRECTORY`/man
+	LIBDIR=`finddir B_COMMON_LIB_DIRECTORY`
+	./configure --prefix=`finddir B_COMMON_DIRECTORY` \
+		--enable-bmp --enable-lbm --enable-pcx \
+		--enable-pnm --enable-tga --enable-xcf --enable-xpm --enable-xv \
+		--enable-gif --enable-jpg --disable-jpg-shared \
+		--libdir=$LIBDIR \
+		--mandir=$MANDIR
+	make
+}
+
+INSTALL()
+{
+	cd SDL_image-1.2.12
+	make install
+}
+
+LICENSE="Zlib"
+COPYRIGHT="1997-2012 Sam Lantinga"