progs/gallium: Move into src/gallium/tests

Two reasons:
- progs will eventually have its own repository
- it is just to easy to forget updating the
  code for interface changes when it is outside of src
diff --git a/src/gallium/SConscript b/src/gallium/SConscript
index b8c04f7..0353b05 100644
--- a/src/gallium/SConscript
+++ b/src/gallium/SConscript
@@ -22,3 +22,6 @@
 SConscript('winsys/SConscript')
 
 SConscript('targets/SConscript')
+
+SConscript('tests/unit/SConscript')
+#SConscript('tests/raw/SConscript')