open_posix_testsuite/../mq_timedsend/12-1: fix long lines

Fix lines going over 80 characters.

Signed-off-by: Jan Stancek <jstancek@redhat.com>
open_posix_testsuite/../mq_timedsend/12-1: fix race

Test can send SIGUSR1 signal after thread has already completed
and report failure from main() and success from a_thread_func():

  conformance/interfaces/mq_timedsend/12-1: execution: UNRESOLVED: Output:
  Error: in pthread_kill
  : Success
  thread: mq_timedsend interrupted by signal and correctly set errno to EINTR

Synchronize exit of a_thread_func(), so that thread can exit only
after loop sending SIGUSR1 completed.

Signed-off-by: Jan Stancek <jstancek@redhat.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>