Update for kernel headers v5.0.3.

All of the structures in binder_kernel.h are now in the upstream kernel.

Test: Builds.
Change-Id: I3719b1ca48515170eca5834b1a29f15086441b50
diff --git a/cmds/servicemanager/binder.h b/cmds/servicemanager/binder.h
index 70be3b4..a9ccc74 100644
--- a/cmds/servicemanager/binder.h
+++ b/cmds/servicemanager/binder.h
@@ -4,10 +4,9 @@
 #ifndef _BINDER_H_
 #define _BINDER_H_
 
+#include <linux/android/binder.h>
 #include <sys/ioctl.h>
 
-#include "binder_kernel.h"
-
 struct binder_state;
 
 struct binder_io