build: Add needed UNIX standard includes.

common/wireaddr.c

@@ -4,6 +4,8 @@
 #include <common/type_to_string.h>
 #include <common/utils.h>
 #include <common/wireaddr.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
 #include <wire/wire.h>
 
 /* Returns false if we didn't parse it, and *cursor == NULL if malformed. */

lightningd/lightningd.c

@@ -29,6 +29,7 @@
 #include <lightningd/log.h>
 #include <lightningd/options.h>
 #include <onchaind/onchain_wire.h>
+#include <signal.h>
 #include <sys/types.h>
 #include <unistd.h>
 

lightningd/subd.c

@@ -14,6 +14,7 @@
 #include <lightningd/log.h>
 #include <lightningd/peer_control.h>
 #include <lightningd/subd.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <sys/socket.h>
 #include <sys/stat.h>