hsmd: convert to new wire generation style.

Note that other directories were explicitly depending on the generated
file, instead of relying on their (already existing) dependency on 
$(LIGHTNINGD_HSM_CLIENT_OBJS), so we remove that.

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

lightningd/onchain_control.c

@@ -3,7 +3,6 @@
 #include <common/key_derive.h>
 #include <common/utils.h>
 #include <errno.h>
-#include <hsmd/gen_hsm_wire.h>
 #include <inttypes.h>
 #include <lightningd/chaintopology.h>
 #include <lightningd/coin_mvts.h>