Merge pull request #694 from mtavenrath/fix_origin_link

Use correct OriginUpperLeft when linking more than one shader.

glslang/MachineIndependent/ShaderLang.cpp

@@ -1707,6 +1707,15 @@ bool TProgram::linkStage(EShLanguage stage, EShMessages messages)
         intermediate[stage] = new TIntermediate(stage,
                                                 firstIntermediate->getVersion(),
                                                 firstIntermediate->getProfile());
+
+
+        // The new TIntermediate must use the same origin as the original TIntermediates.
+        // Otherwise linking will fail due to different coordinate systems.
+        if (firstIntermediate->getOriginUpperLeft()) {
+            intermediate[stage]->setOriginUpperLeft();
+        }
+        intermediate[stage]->setSpv(firstIntermediate->getSpv());
+
         newedIntermediate[stage] = true;
     }