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.length.frag

@@ -0,0 +1,18 @@
+#version 120
+
+uniform vec4 u[3];
+
+#ifdef TEST_POST_110
+varying vec2 v[];
+#else
+varying vec2 v[2];
+#endif
+
+void main()
+{
+    int a[5];
+
+    vec2 t = v[0] + v[1];
+
+    gl_FragColor = vec4(u.length() * v.length() * a.length());
+}