tests: Add some geometry shader tests

render_test GeometryShaderHelloWorld
render_test GSUniformBufferLayout
render_test GSPositions
render_test GSTriStrip
diff --git a/tests/vkrenderframework.cpp b/tests/vkrenderframework.cpp
index 9def17d..3bfa49a 100644
--- a/tests/vkrenderframework.cpp
+++ b/tests/vkrenderframework.cpp
@@ -956,8 +956,10 @@
         createInfo.codeSize = spv.size() * sizeof(unsigned int);
         createInfo.flags = 0;
 
-        init(*m_device, createInfo);
+        err = init_try(*m_device, createInfo);
     }
+
+    assert(VK_SUCCESS == err);
 }
 
 VkPipelineObj::VkPipelineObj(VkDeviceObj *device)