dist: remove support for lzma (superseded by xz and lzip) See also commit `v1.11-611-ge637fa2' (from maint), where support for lzma compression of distribution archive had been deprecated. * NEWS: Update. * lib/Automake/Options.pm: Error out if the `dist-lzma' option is used. * lib/am/distdir.am: Remove all support for the creation of a lzma-compressed distribution archive. * tests/lzma.test: Update.