Update from Gnulib
* build-aux/config.guess, doc/misc/texinfo.tex: * lib/mktime-internal.h, lib/mktime.c, lib/timegm.c: Copy from Gnulib. * lib/gnulib.mk.in: Regenerate.
* build-aux/config.guess, doc/misc/texinfo.tex: * lib/mktime-internal.h, lib/mktime.c, lib/timegm.c: Copy from Gnulib. * lib/gnulib.mk.in: Regenerate.