automake: Update to version 1.18

automake: Update to version 1.18

- Update from version 1.17 to 1.18
- Update of rootfile
- Changelog
    1.18
	* New features added
	  - Default tar format is now ustar, mainly to support longer filenames;
	    the tar-v7 and other explicit options to force a particular tar
	    format are unchanged and still override the default. (bug#74847)
	  - The mdate-sh auxiliary script generally used with Texinfo now uses
	    SOURCE_DATE_EPOCH, if set, instead of the source file's mtime. (bug#77805)
	  - New option dist-bzip3 for bzip3 compression of distributions. (bug#73795)
	  - New option --stderr-prefix for tap-driver.sh, to prefix each line of
	    stderr from a test script with a given string. (bug#72536)
	  - Support for Algol 68 added, based on the GNU Algol 68 compiler. (bug#75807)
	* Bugs fixed
	  - Do not make Perl warnings fatal, per Perl's recommendation.
	    (https://lists.gnu.org/archive/html/automake/2025-01/msg00003.html)
	  - Avoid Perl 5.41.8+ precedence warning for use of !!.
	    (https://lists.gnu.org/archive/html/automake/2025-01/msg00000.html)
	  - a Perl path containing whitespace now emits a warning instead of
	    an error, so ./configure PERL='/usr/bin/env perl' can work. (bug#74453)
	  - The py-compile script once again does nothing (successfully) if the
	    PYTHON environment variable is set to ":", or anything that isn't a
	    Python interpreter (according to $PYTHON -V). Exception: if PYTHON
	    is set to "false", do nothing but exit unsuccessfully, also to match
	    previous behavior. (bug#74434)
	  - The no-dist-built-sources Automake option now operates (hopefully) as
	    intended, i.e., omits the dependency on $(BUILT_SOURCES) for the
	    distdir target. (bug#69908)
	  - Only warn about install.sh being found, instead of it being a fatal
	    error. (bug#19964)
	  - The compile script is more robust to Windows configurations;
	    specifically, avoids double-path translation on MSYS. (bug#75939)
	  - The test infrastructure sets the CONFIG_SITE environment variable to
	    /dev/null, to avoid the local system's Autoconf site defaults from
	    breaking the test environment. (bug#76622)
	  - AM_SILENT_RULES once again always ends with a newline. (bug#72267)
	  - AM_SANITY_CHECK now outputs "no" on failure, so that a complete line
	    is written to stdout before the error message is written to stderr.
	    (bug#76448)
	* Miscellaneous changes
	  - Only require the presence of an ABOUT-NLS file at the 'gnits'
	    strictness level.
	    (https://lists.gnu.org/archive/html/automake/2024-10/msg00006.html)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>