ralloc: Add a fake implementation of ralloc based on talloc.
diff --git a/src/glsl/SConscript b/src/glsl/SConscript
index 5885e4b..078b400 100644
--- a/src/glsl/SConscript
+++ b/src/glsl/SConscript
@@ -77,6 +77,7 @@
     'opt_structure_splitting.cpp',
     'opt_swizzle_swizzle.cpp',
     'opt_tree_grafting.cpp',
+    'ralloc.c',
     's_expression.cpp',
     'strtod.c',
 ]