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.150.vert

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+#version 150 core
+
+in vec4 iv4;
+
+uniform float ps;
+uniform int ui;
+
+invariant gl_Position;
+
+struct s1 {
+    int a;
+    int a2;
+    vec4 b[3];
+};
+
+struct s2 {
+    int c;
+    s1 d[4];
+};
+
+out s2 s2out;
+
+void main()
+{
+    gl_Position = iv4;
+    gl_PointSize = ps;
+    gl_ClipDistance[2] = iv4.x;
+    int i;
+    s2out.d[i].b[2].w = ps;
+    
+    // test recovery from nonsupported built-ins    
+    //float n1 = noise1(2.4);
+    //n1 = noise1(vec4(n1));
+    //vec2 n2 = noise2(vec3(n1));
+    //vec3 n3 = noise3(n2);
+    //vec4 n4 = noise4(n3);
+}
+
+out float gl_ClipDistance[4];