On this platform, <sys/time.h> declares utimens and lutimens and the
C library defines them, so we needn’t (and shouldn’t).
Problem reported privately by Thomas Klausner.
* lib/utimens.c (utimens) [HAVE_UTIMENS]: Don’t define.
(lutimens) [HAVE_LUTIMENS]: Don’t define.
* lib/utimens.h [HAVE_UTIMENS || HAVE_LUTIMENS]:
Include <sys/time.h>, for NetBSD’s declaration of utimens and lutimens.
(utimens) [HAVE_UTIMENS]: Don’t declare.
(lutimens) [HAVE_LUTIMENS]: Don’t declare.
* m4/utimens.m4 (gl_UTIMENS): Check for utimens, lutimens.