bridge_basic: Fixed setup of recall channels

Fixed a bug (like a typo) in retransfer_enter()
at main/bridge_basic.c:2641. common_recall_channel_setup() setups
common things on the recalled transfer target, but used same target
as source instead trasfered.

ASTERISK-29161 #close

Change-Id: Ieb549654a621c38b1ad5e9d15b9f18823d9cc31f