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.flowControl.frag

@@ -0,0 +1,23 @@
+#version 120
+
+uniform float d;
+uniform vec4 bigColor, smallColor;
+uniform vec4 otherColor;
+
+varying float c;
+varying vec4 BaseColor;
+
+void main()
+{
+    vec4 color = BaseColor;
+    vec4 color2;
+
+    color2 = otherColor;
+
+    if (c > d)
+        color += bigColor;
+    else
+        color += smallColor;
+
+    gl_FragColor = color * color2;
+}