Reflect pipeline outputs as well as inputs, optionally from other stages

* We add an option to reflect inputs from other stages than vertex, if only a
  later subset of the stages is linked into the program.
diff --git a/StandAlone/StandAlone.cpp b/StandAlone/StandAlone.cpp
index c9b1ede..7588320 100644
--- a/StandAlone/StandAlone.cpp
+++ b/StandAlone/StandAlone.cpp
@@ -528,6 +528,8 @@
                         ReflectOptions |= EShReflectionStrictArraySuffix;
                     } else if (lowerword == "reflect-basic-array-suffix") {
                         ReflectOptions |= EShReflectionBasicArraySuffix;
+                    } else if (lowerword == "reflect-intermediate-io") {
+                        ReflectOptions |= EShReflectionIntermediateIO;
                     } else if (lowerword == "resource-set-bindings" ||  // synonyms
                                lowerword == "resource-set-binding"  ||
                                lowerword == "rsb") {
@@ -1525,6 +1527,8 @@
            "  --no-storage-format | --nsf       use Unknown image format\n"
            "  --reflect-strict-array-suffix     use strict array suffix rules when reflecting\n"
            "  --reflect-basic-array-suffix      arrays of basic types will have trailing [0]\n"
+           "  --reflect-intermediate-io         reflection includes inputs/outputs of linked shaders\n"
+           "                                    rather than just vertex/fragment\n"
            "  --resource-set-binding [stage] name set binding\n"
            "                                    set descriptor set and binding for\n"
            "                                    individual resources\n"