maint.mk: adapt openat.h-include-without-use test

* top/maint.mk (sc_prohibit_openat_without_use): Also check for
FCHMODAT_INLINE, FCHOWNAT_INLINE and STATAT_INLINE, to avoid
failing on gnulib's own lib/{chmod,chown,stat}at.c files.
With this change, running "make sc_maint" in gnulib's top-level
directory now passes for me.
maint: remove duplicate ChangeLog entry

* ChangeLog: My 2014-01-03 entry was listed twice.  Remove the latest.
Spotted by Bernhard Voelker.
relocatable-maint.texi: escape braces

The change causes makeinfo 5.2 to fail:

env LANG= LC_MESSAGES= LC_ALL= LANGUAGE= makeinfo --no-split
--reference-limit=2000 gnulib.texi
./relocatable-maint.texi:153: misplaced {
...

Escaping the braces as per the attached patch seems to fix this.
update from texinfo
strtoimax: port to platforms lacking 'long long'

VMS's pre-C99 compiler lacks 'long long', so 'configure' doesn't
check whether strtoll is declared, which causes the C file to
wrongly report an error.  Problem reported by Steven M. Schweda in:
http://lists.gnu.org/archive/html/bug-diffutils/2014-01/msg00003.html
* lib/strtoimax.c (strtoull):
Declare only if HAVE_UNSIGNED_LONG_LONG_INT.
(strtoll): Declare only if HAVE_LONG_LONG_INT.