Add support for GLSL_EXT_ray_tracing

and SPV_KHR_ray_tracing

Test/spv.ext.IntersectShader_Errors.rint

@@ -0,0 +1,11 @@
+#version 460
+#extension GL_EXT_ray_tracing : enable
+rayPayloadInEXT vec4 payloadIn;                             // ERROR, rayPayloadIn unsupported in this stage
+rayPayloadEXT vec4 payload;                                 // ERROR, rayPayload unsuppoted in this stage
+uniform accelerationStructureEXT accEXT;
+void main()
+{
+    float e12 = gl_HitTEXT;                                 // ERROR, unsupported builtin in stage
+    float e13 = gl_HitKindEXT;                              // ERROR, unsupported builtin in stage
+    traceRayEXT(accEXT, 0, 0, 1, 1, 0, vec3(0.0f), 0.5f, vec3(1.0f), 0.75f, 0); // ERROR, unsupported
+}