[binutils-gdb] Use an array type (lwpid_t[]) for the array of lwp IDs.

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 329d5e7e56f852dcf9956683be4345c165d277db ***

Author: John Baldwin <jhb@FreeBSD.org>
Branch: master
Commit: 329d5e7e56f852dcf9956683be4345c165d277db

Use an array type (lwpid_t[]) for the array of lwp IDs.

gdb/ChangeLog:

	* fbsd-nat.c (fbsd_add_threads): Use array type for `lwps'.