kbproto is required to build libXinerama

because x11.pc depends on it.

component/xorg/buildout.cfg

@@ -346,7 +346,7 @@ recipe = slapos.recipe.cmmi
 url = http://www.x.org/releases/X11R7.6/src/lib/libXinerama-1.1.1.tar.bz2
 md5sum = ecd4839ad01f6f637c6fb5327207f89b
 environment =
-  PKG_CONFIG_PATH=${libX11:location}/lib/pkgconfig:${libXau:location}/lib/pkgconfig:${libXext:location}/lib/pkgconfig:${libxcb:location}/lib/pkgconfig:${xextproto:location}/lib/pkgconfig:${xineramaproto:location}/lib/pkgconfig:${xorg-libpthread-stubs:location}/lib/pkgconfig:${xproto:location}/lib/pkgconfig
+  PKG_CONFIG_PATH=${kbproto:location}/lib/pkgconfig:${libX11:location}/lib/pkgconfig:${libXau:location}/lib/pkgconfig:${libXext:location}/lib/pkgconfig:${libxcb:location}/lib/pkgconfig:${xextproto:location}/lib/pkgconfig:${xineramaproto:location}/lib/pkgconfig:${xorg-libpthread-stubs:location}/lib/pkgconfig:${xproto:location}/lib/pkgconfig
   PATH=${pkgconfig:location}/bin:%(PATH)s
 configure-options =
   --disable-static