bitcoin/tx: move bitcoin_tx_from_file() to test-cli, expose bitcoin_tx_from_hex()

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

test-cli/create-commit-spend-tx.c

@@ -22,6 +22,7 @@
 #include "funding.h"
 #include "version.h"
 #include "bitcoin/locktime.h"
+#include "tx_from_file.h"
 #include <unistd.h>
 
 int main(int argc, char *argv[])