vty/bts_resend_cmd: Use gsm_bts_set_system_infos() to increment changemark

We assume the SI shall be re-sent because something has changed.  This
means that change_mark should be incremented.  Let's call
gsm_bts_set_system_infos() which already does the trick.

Change-Id: I73d9bd3cddc561f3a7af8bcc225fac126dca3f78
Closes: OS#3679
1 file changed