tools, fit_info: increase buffer for command name

currently the buffer for command name is 50 bytes only. If using
fit_info with long absolute paths, this is not enough, so raise
it to 256 (as it is in fit_check_sign)

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>

tools/fit_info.c

@@ -48,10 +48,11 @@ int main(int argc, char **argv)
 	char *fdtfile = NULL;
 	char *nodename = NULL;
 	char *propertyname = NULL;
-	char cmdname[50];
+	char cmdname[256];
 	int c;
 
-	strcpy(cmdname, *argv);
+	strncpy(cmdname, *argv, sizeof(cmdname) - 1);
+	cmdname[sizeof(cmdname) - 1] = '\0';
 	while ((c = getopt(argc, argv, "f:n:p:")) != -1)
 		switch (c) {
 		case 'f':