util: Gather some common macros

This gathers macros that have been included across components into util so
that the include chain can be more vertical.  In particular, this makes
util stand on its own without any dependence whatsoever on the rest of
mesa.

Signed-off-by: "Jason Ekstrand" <jason.ekstrand@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/gallium/targets/libgl-xlib/SConscript

@@ -29,6 +29,7 @@ env.Prepend(LIBS = [
     ws_xlib,
     mesautil,
     glapi,
+    mesautil,
     mesa,
     glsl,
     gallium,