kbd: Update to version 2.8.0

kbd: Update to version 2.8.0

- Update from version 2.7.1 to 2.8.0
- Update of rootfile
- Changelog
    2.8.0
	keymaps:
	    Add Georgian font (LatCyrHebKa-16_GIA.psfu) and keymap (i386/qwerty/ge).
	    Add new i386 azerty afnor keymap (i386/azerty/fr-afnor).
	    Disable characters >=U+F000 in qwertz/de_alt_UTF-8.
	libkeymap:
	    Support KT_DEAD2 diacritics.
	    Fix memory leaks.
	utils:
	    kbd_mode: support Disabled mode (K_OFF).
	build-sys:
	    configure: Restore the old behavior when using gzip.
	    configure: Disable lex implementations other than flex.
	other:
	    tests: Fix tests on powerpc.
	    tests: Add build and check on other architectures (x86_64, s390x, ppc64el).
	    tests: Add valgrind check in unit tests.
	    tests: Add sparse check and fix detected warnings.
	    tests: Add tests to increase code coverage.
	    tests: Check all distributed keymaps for loadability.

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