glslang SPV tests: Add two more source tests for the last check in.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31213 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/spv.set.vert

@@ -0,0 +1,14 @@
+#version 450
+
+layout(set = 4, binding = 7) uniform sampler2D sampler;
+
+layout(set = 0, binding = 8) buffer setBuf {
+    vec4 color;
+} setBufInst;
+
+out vec4 color;
+
+void main()
+{
+    color = setBufInst.color;
+}