wallet/tests: add mocks for futureproofing.

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

wallet/test/run-db.c

@@ -10,6 +10,9 @@ static void db_fatal(const char *fmt, ...);
 #include <stdio.h>
 #include <unistd.h>
 
+/* AUTOGENERATED MOCKS START */
+/* AUTOGENERATED MOCKS END */
+
 static char *db_err;
 static void db_fatal(const char *fmt, ...)
 {

wallet/test/run-wallet.c

@@ -14,6 +14,9 @@ static void wallet_fatal(const char *fmt, ...);
 #include <stdio.h>
 #include <unistd.h>
 
+/* AUTOGENERATED MOCKS START */
+/* AUTOGENERATED MOCKS END */
+
 static char *wallet_err;
 static void wallet_fatal(const char *fmt, ...)
 {