Add support for GLSL_EXT_ray_tracing

and SPV_KHR_ray_tracing

Test/spv.ext.RayGenShader.rgen

@@ -0,0 +1,20 @@
+#version 460
+#extension GL_EXT_ray_tracing : enable
+layout(binding = 0, set = 0) uniform accelerationStructureEXT accEXT0;
+layout(binding = 1, set = 0) uniform accelerationStructureEXT accEXT1; // Unused
+layout(binding = 2, r32ui) shadercallcoherent uniform uimage2D imageu;
+layout(location = 0) rayPayloadEXT vec4 payload;
+layout(shaderRecordEXT) buffer block
+{
+	vec3 dir;
+	vec3 origin;
+
+};
+void main()
+{
+    uint lx = gl_LaunchIDEXT.x;
+    uint ly = gl_LaunchIDEXT.y;
+    uint sx = gl_LaunchSizeEXT.x;
+    uint sy = gl_LaunchSizeEXT.y;
+    traceRayEXT(accEXT0, lx, ly, sx, sy, 0u, origin, 0.5f, dir, 0.75f, 1);
+}