gallium: Make scons build gallivm before other auxiliary modules.

This ensures that the gallivm symbols referenced by the draw module are
resolved properly.
diff --git a/src/gallium/SConscript b/src/gallium/SConscript
index fa4833c..f09778c 100644
--- a/src/gallium/SConscript
+++ b/src/gallium/SConscript
@@ -9,6 +9,9 @@
 Export('auxiliaries')
 
 
+if llvm:
+	SConscript(['auxiliary/gallivm/SConscript'])
+
 SConscript([
 	# NOTE: order matters!
 	'auxiliary/util/SConscript',
@@ -19,8 +22,5 @@
 	'auxiliary/pipebuffer/SConscript',
 ])
 
-if llvm:
-	SConscript(['auxiliary/gallivm/SConscript'])
-
 for driver in env['drivers']:
 	SConscript(os.path.join('drivers', driver, 'SConscript'))