libreplace: always provide utime() and utimes()

libreplace: always provide utime() and utimes()

I'd like to also provide futimes(), but it seems
that some systems doesn't support a it at kernel level.

If someone knows how to write a portable replacement
for futimes() please tell me...

metze
(cherry picked from commit a9604fe4a323dccb537cf02ea7594437b4995803)
(This used to be commit 8a241cf150fba787c82cbcb03730083ced442fbb)