GL: Ensure mesa_devel and mesa_swrast are always present

* As the OpenGL kit is assumed by most ports (and BeOS apps)
  to "exist", lets make mesa_devel present by default until
  post R1
* mesa_swrast ensures we always have the basic swrast renderer
  To play with mesa_swpipe (gallium llvmpipe, gcc4) uninstall
  mesa_swrast and install mesa_swpipe. (you can install both,
  but it's first renderer found, first used atm)

Jamfile

@@ -15,8 +15,9 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 if ! $(HAIKU_BOOTSTRAP_BUILD) {
 	# primary architecture
 	AddHaikuImagePackages
-		bzip2 ctags ffmpeg freetype glu grep icu jpeg libpng libsolv mesa sed
-		tar which zlib
+		bzip2 ctags grep sed tar which zlib
+		ffmpeg freetype icu jpeg libpng libsolv
+		mesa mesa_devel mesa_swrast glu
 		;
 
 	# secondary architectures