scons: Add glsl_symbol_table.cpp
diff --git a/src/glsl/SConscript b/src/glsl/SConscript
index 96a226d..a808a5b 100644
--- a/src/glsl/SConscript
+++ b/src/glsl/SConscript
@@ -25,6 +25,7 @@
     'glsl_parser.cpp',
     'glsl_parser_extras.cpp',
     'glsl_types.cpp',
+    'glsl_symbol_table.cpp',
     'hir_field_selection.cpp',
     'ir_algebraic.cpp',
     'ir_basic_block.cpp',