Fix build from implicit declaration.

Turn the warning on by default and turn on -Werror so this doesn't
happen next time.

Change-Id: Id65bf0cb63bbf0ff224655b425463ae2f55435df
diff --git a/minadbd/fuse_adb_provider.c b/minadbd/fuse_adb_provider.c
index e926285..2386e82 100644
--- a/minadbd/fuse_adb_provider.c
+++ b/minadbd/fuse_adb_provider.c
@@ -21,6 +21,7 @@
 
 #include "adb.h"
 #include "fuse_sideload.h"
+#include "transport.h"
 
 struct adb_data {
     int sfd;  // file descriptor for the adb channel