scons: add common.c as part of glcpp build

to have _mesa_error_no_memory function available

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79440
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
diff --git a/src/glsl/SConscript b/src/glsl/SConscript
index fe9d507..dc35477 100644
--- a/src/glsl/SConscript
+++ b/src/glsl/SConscript
@@ -106,6 +106,6 @@
 
 glcpp = env.Program(
     target = 'glcpp/glcpp',
-    source = ['glcpp/glcpp.c'] + mesa_objs,
+    source = ['glcpp/glcpp.c', 'tests/common.c'] + mesa_objs,
 )
 env.Alias('glcpp', glcpp)