emacsclient: fix typo on recent socket-leak change

This ports to POSIXish platforms like macOS that lack SOCK_CLOEXEC.
Fix suggested by Eli Zaretskii in:
https://lists.gnu.org/r/emacs-devel/2018-12/msg00055.html
* lib-src/emacsclient.c (set_local_socket):
Don’t use SOCK_CLOEXEC; that’s cloexec_socket’s job.
1 job for master in 22 minutes and 10 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #200
test

00:22:10

 
Name Stage Failure
failed
test Test
Makefile:301: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/tzz/emacs/test'
make[1]: *** [check] Error 2
Makefile:271: recipe for target 'check' failed
make[1]: Leaving directory '/builds/tzz/emacs/test'
Makefile:955: recipe for target 'check' failed
make: *** [check] Error 2
ERROR: Job failed: exit code 1