glsl: Add ir_constant_expression.cpp to SConscript.

This was accidentally removed in commit 32aaf89823de11e98cb59d5ec78c66cd3e74bcd4.

Fixes SCons builds.

diff --git a/src/glsl/SConscript b/src/glsl/SConscript
index 20cb91b60776f8d2a5a609ebd4c0a45b7166484e..4cb2d8bcb360a7a49feb31072df45126e69adecc 100644 (file)
--- a/src/glsl/SConscript
+++ b/src/glsl/SConscript
@@ -29,6 +29,7 @@ sources = [
     'hir_field_selection.cpp',
     'ir_basic_block.cpp',
     'ir_clone.cpp',
+    'ir_constant_expression.cpp',
     'ir.cpp',
     'ir_expression_flattening.cpp',
     'ir_function_can_inline.cpp',