daemon/peer: move struct peer to internal header.

We use a different 'struct peer' in the new daemons, so make sure
the structure isn't assumed in any shared files.

This is a temporary shim.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/commit_tx.c

@@ -10,6 +10,7 @@
 #include "log.h"
 #include "overflows.h"
 #include "peer.h"
+#include "peer_internal.h"
 #include "permute_tx.h"
 #include "remove_dust.h"
 #include "utils.h"