GLSL 1.50: Test that layout qualifier ids can be listed in any order

tests/spec/glsl-1.50/compiler/layout-any-order-ids.frag

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+// [config]
+// expect_result: pass
+// glsl_version: 1.50
+// check_link: true
+// [end config]
+//
+// Section 4.3.8(Layout Qualifiers) of the GLSL 1.50 spec says:
+// "The tokens in any layout-qualifier-id-list are identifiers, not keywords.
+//  Generally, they can be listed in any order. Order-dependent meanings exist
+//  only if explicitly called out below. Similarly, these identifiers are not
+//  case sensitive, unless explicitly noted otherwise."
+
+#version 150
+
+layout(pixel_center_integer, origin_upper_left) in vec4 gl_FragCoord;
+layout(origin_upper_left, pixel_center_integer) in vec4 gl_FragCoord;
+
+void main()
+{
+	gl_FragColor = vec4(0., 1., 0., 1.);
+}