gbproxy: Fail on timeout in f_send_paging_xs_exp_one_bss

These functions would not set a verdict in case no message was ever
received. This patch ensures that a timeout while waiting for a paging
message actually fails the test.

Change-Id: If71db2d37d67d02c5d9550202128ee3470762964
Related: SYS#5002
1 file changed