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.whileLoop.frag

@@ -0,0 +1,16 @@
+#version 110
+
+uniform vec4 bigColor;
+varying vec4 BaseColor;
+uniform float d;
+
+void main()
+{
+    vec4 color = BaseColor;
+
+    while (color.x < d) {
+        color += bigColor;
+    }
+
+    gl_FragColor = color;
+}