Fix Mac OS build for libziparchive.

BSD off_t are implicitly 64 bit so the platform
doesn't define off64_t.

Change-Id: I51cbe94ead01d2d6bc7c5010d9472487bee7c2d3
diff --git a/include/ziparchive/zip_archive.h b/include/ziparchive/zip_archive.h
index 54b889c..ac3d792 100644
--- a/include/ziparchive/zip_archive.h
+++ b/include/ziparchive/zip_archive.h
@@ -22,6 +22,7 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+#include <utils/Compat.h>
 
 __BEGIN_DECLS