Refine DebugHelper.h into Log.h.

This removes USE_FUNC_LOGGER from libbcc-config.mk.
diff --git a/lib/RenderScript/RSInfo.cpp b/lib/RenderScript/RSInfo.cpp
index 0d31e38..536c83b 100644
--- a/lib/RenderScript/RSInfo.cpp
+++ b/lib/RenderScript/RSInfo.cpp
@@ -21,7 +21,7 @@
 #include <new>
 
 #include "bcc/Support/FileBase.h"
-#include "bcc/Support/DebugHelper.h"
+#include "bcc/Support/Log.h"
 #include "bcc/Support/Sha1Helper.h"
 
 using namespace bcc;