Provide a pass that creates information about global variables in RS.

Bug: 20306487

This change implements RSGlobalInfoPass, which is an optional LLVM pass that
adds several new global variables to a given Module. These variables contain
information about the other RenderScript global variables that are present.

Change-Id: I671013c11c7a528254edad5c66f2858953c0f5c4
diff --git a/lib/Renderscript/Android.mk b/lib/Renderscript/Android.mk
index 47ed2e7..56cae16 100644
--- a/lib/Renderscript/Android.mk
+++ b/lib/Renderscript/Android.mk
@@ -25,6 +25,7 @@
   RSCompilerDriver.cpp \
   RSEmbedInfo.cpp \
   RSForEachExpand.cpp \
+  RSGlobalInfoPass.cpp \
   RSInvariant.cpp \
   RSScript.cpp \
   RSInvokeHelperPass.cpp \