* Add gnulib files generated by gnulib-tool in build-aux, m4 and
    grub-core/gnulib directories
    * .bzignore: Add **/.deps and autogenerated gnulib files
    * configure.ac: Assign auxiliary directory to build-aux, add invocation
    of gnulib macros, add grub-core/gnulib/Makefile
    * Makefile.am: Add gnulib directory in SUBDIRS (removing unnecessary .),
    include m4 directory to aclocal.
    * Makefile.util.def: Remove direct compilation of gnulib source files
    and use the new grub-core/gnulib/libgnu.a.
    * build-aux/config.rpath: move config.rpath from top directory to
    build-aux
    * conf/Makefile.common: Remove the macro _GL_UNUSED already defined
    in gnulib headers
    * conf/Makefile.extra-dist: Add m4/gnulib-cache.m4
    * grub-core/Makefile.core.def: Remove unnecessary extra_dist
    * grub-core/lib/posix_wrap/localcharset.h (locale_charset): Update
    header.
    * grub-core/lib/posix_wrap/langinfo.h (nl_langinfo): Return static
    string.

	* Makefile.in (GNULIB_CFLAGS): New variable.
	* conf/common.rmk (grub_mkisofs_CFLAGS): Add GNULIB_CFLAGS.
	(grub_script_check_CFLAGS): New variable.
	* gnulib/alloca.h: Resync with gnulib.
	* gnulib/error.c: Likewise.
	* gnulib/error.h: Likewise.
	* gnulib/fnmatch.c: Likewise.
	* gnulib/fnmatch_loop.c: Likewise.
	* gnulib/getdelim.c: Likewise.
	* gnulib/getline.c: Likewise.
	* gnulib/getopt.c: Likewise.
	* gnulib/getopt1.c: Likewise.
	* gnulib/getopt_int.h: Likewise.
	* gnulib/gettext.h: Likewise.
	* gnulib/progname.c: Likewise.
	* gnulib/progname.h: Likewise.

        * gnulib/fnmatch_loop.c (EXT): Fix warning (signed and unsigned type in
        conditional expression).

        Import from Gnulib.

        * gnulib/fnmatch.c: New file.
        * gnulib/fnmatch.h: Likewise.
        * gnulib/fnmatch_loop.c: Likewise.
        * gnulib/getopt.c: Likewise.
        * gnulib/getopt.h: Likewise.
        * gnulib/getopt1.c: Likewise.
        * gnulib/getopt_int.h: Likewise.
        * gnulib/gettext.h: Likewise.