MSL: Add missing reference output for pr 2536.

Author: HansKristian-Work

reference/opt/shaders-msl/asm/frag/spec-constant-bool-mixed.asm.frag

@@ -0,0 +1,21 @@
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+constant bool _3_tmp [[function_constant(0)]];
+constant bool _3 = is_function_constant_defined(_3_tmp) ? _3_tmp : true;
+constant uint _4 = is_function_constant_defined(_3_tmp) ? uint(_3_tmp) : 0u;
+
+struct main0_out
+{
+    float4 m_2 [[color(0)]];
+};
+
+fragment main0_out main0()
+{
+    main0_out out = {};
+    out.m_2 = float4(float(_4) + float(_3));
+    return out;
+}
+

reference/shaders-msl/asm/frag/spec-constant-bool-mixed.asm.frag

@@ -0,0 +1,21 @@
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+constant bool _3_tmp [[function_constant(0)]];
+constant bool _3 = is_function_constant_defined(_3_tmp) ? _3_tmp : true;
+constant uint _4 = is_function_constant_defined(_3_tmp) ? uint(_3_tmp) : 0u;
+
+struct main0_out
+{
+    float4 m_2 [[color(0)]];
+};
+
+fragment main0_out main0()
+{
+    main0_out out = {};
+    out.m_2 = float4(float(_4) + float(_3));
+    return out;
+}
+