OpenTTD: add recipes for the base data sets.

It's now possible to play the game without original Transport Tycoon
Deluxe datafiles.

games-simulation/openttd_sfx/openttd_sfx-0.2.3.recipe

@@ -0,0 +1,44 @@
+SUMMARY="OpenTTD - free sound files"
+DESCRIPTION="
+OpenTTD is an open source simulation game based upon the popular Microprose
+game \"Transport Tycoon Deluxe\", written by Chris Sawyer. It attempts to mimic
+the original game as closely as possible while extending it with new features.
+
+This package provides free to use sound files. You can use them if you don't
+have the files from the original Transport Tycoon Deluxe game.
+"
+HOMEPAGE="http://www.openttd.org"
+SRC_URI="http://binaries.openttd.org/extra/opensfx/$portVersion/opensfx-$portVersion-all.zip"
+CHECKSUM_MD5="3605b82f24153500c8a1804e4420168a"
+REVISION="1"
+ARCHITECTURES="x86_gcc2 x86"
+
+SOURCE_DIR="opensfx-$portVersion"
+PROVIDES="
+	openttd_sfx = $portVersion
+	"
+
+#REQUIRES="
+#	"
+
+#BUILD_REQUIRES="
+#	"
+
+#BUILD_PREREQUIRES="
+#	"
+
+BUILD()
+{
+	echo "Nothing to build!"
+}
+
+INSTALL()
+{
+	mkdir -p $dataDir/openttd/baseset/opensfx
+	cp * $dataDir/openttd/baseset/opensfx
+}
+
+# no TEST script available
+
+COPYRIGHT="2005-2013 OpenTTD Team"
+LICENSE="GNU GPL v2"