Revert "Revert "Split out libhidl-gen and libhidl-gen-utils.""

Shared code between hidl-gen, c2hal, and VTS.

Also build for device, as we might use libhidl-gen reflectively in
future (for profiling and instrumentation).

Change-Id: Ia56901f4afbc12b7c2abee693e0ebea97ba76a8b
diff --git a/main.cpp b/main.cpp
index 134cc6b..4e2e2b4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -16,10 +16,10 @@
 
 #include "AST.h"
 #include "Coordinator.h"
-#include "Formatter.h"
 #include "FQName.h"
 #include "Scope.h"
 
+#include <hidl-util/Formatter.h>
 #include <android-base/logging.h>
 #include <set>
 #include <stdio.h>