SPV: Implement Vulkan version of GLSL (KHR_vulkan_glsl).

Test/spv.specConstant.vert

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+#version 400
+
+layout(constant_id = 16) const int arraySize = 5;
+in vec4 ucol[arraySize];
+
+layout(constant_id = 17) const bool spBool = true;
+layout(constant_id = 18) const float spFloat = 3.14;
+layout(constant_id = 19) const double spDouble = 3.1415926535897932384626433832795;
+layout(constant_id = 22) const uint scale = 2;
+
+out vec4 color;
+out int size;
+
+// parameter should be considered same type as ucol
+void foo(vec4 p[arraySize]);
+
+void main()
+{
+    color = ucol[2];
+    size = arraySize;
+    if (spBool)
+        color *= scale;
+    color += float(spDouble / spFloat);
+
+    foo(ucol);
+}
+
+layout(constant_id = 116) const int dupArraySize = 12;
+in vec4 dupUcol[dupArraySize];
+
+layout(constant_id = 117) const bool spDupBool = true;
+layout(constant_id = 118) const float spDupFloat = 3.14;
+layout(constant_id = 119) const double spDupDouble = 3.1415926535897932384626433832795;
+layout(constant_id = 122) const uint dupScale = 2;
+
+void foo(vec4 p[arraySize])
+{
+    color += dupUcol[2];
+    size += dupArraySize;
+    if (spDupBool)
+        color *= dupScale;
+    color += float(spDupDouble / spDupFloat);
+}