Move art host to libc++

Change-Id: Ia51a4fdfdbae7377130a43c401c2d8d241671d1e
diff --git a/compiler/output_stream.h b/compiler/output_stream.h
index 478a854..b5ac933 100644
--- a/compiler/output_stream.h
+++ b/compiler/output_stream.h
@@ -18,8 +18,8 @@
 #define ART_COMPILER_OUTPUT_STREAM_H_
 
 #include <stdint.h>
-
 #include <string>
+#include <sys/types.h>
 
 #include "base/macros.h"