glsl: Add ir_function_detect_recursion.cpp to SConscript.
diff --git a/src/glsl/SConscript b/src/glsl/SConscript
index 1441cc7..ea104ab 100644
--- a/src/glsl/SConscript
+++ b/src/glsl/SConscript
@@ -50,6 +50,7 @@
     'ir.cpp',
     'ir_expression_flattening.cpp',
     'ir_function_can_inline.cpp',
+    'ir_function_detect_recursion.cpp',
     'ir_function.cpp',
     'ir_hierarchical_visitor.cpp',
     'ir_hv_accept.cpp',