glslang SPV tests: Add a set of SPV tests.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31212 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/spv.voidFunction.frag

@@ -0,0 +1,34 @@
+#version 120
+
+uniform vec4 bigColor;
+varying vec4 BaseColor;
+uniform float d;
+
+float bar = 2.0;
+
+void foo()
+{
+    bar++;
+
+	return;
+}
+
+void foo2()
+{
+    bar++;
+}
+
+void main()
+{
+	vec4 outColor = bigColor;
+
+	foo();
+
+	foo2();
+
+	outColor.x += bar;
+
+    gl_FragColor = outColor;
+
+	return;
+}