* sysdeps/gnu/errlist.awk: Produce N_("..."), not _N("...").
* intl: Updated from gettext-0.10.13.
* intl/localealias.c intl/dcgettext.c [_LIBC]: Define HAVE_ALLOCA.
* signal/siggetmask.c: New file. Wrapper around sigblock with
link_warning about obsolescence.
* signal/Makefile (routines): Add siggetmask.
* sysdeps/gnu/errlist.awk: New file, adapted from ...
* sysdeps/mach/hurd/errlist.awk: File removed, above file replaces it.
* sysdeps/mach/hurd/Makefile (errlist.c): Target removed.
* sysdeps/gnu/Makefile: New file.
(sysdeps/gnu/errlist.c): Make the errlist.c generation rule into this.
* manual/errno.texi (Error Codes): Add placeholder items for missing
Linux/i386 errno codes, with perror text but no documentation.
Some existing perror texts changed.
