MFC r353491 by eugen:

Add missing port to the list of needed tools in the README file
describing locale rebuild process:

devel/apache-ant

MFC r353791:

tools/tools/locale: allow POSIX target to be built in parallel

While it's rarely used target, more so a one not used during the
buildworld, it helps when it's not taking hours (literally).

MFC r364245 by hrs:

• Update to Unicode CLDR v35 (Unicode 12.0).

• Update tools/tools/locale to add make targets to automatically generate locale source files. With this change, just typing "make obj && make -j4" will rebuild them. Check README for more details.

• Fix issues in ja_JP ctypedef and range specification support in utf8-rollup.pl.

• Add a temporary patch for UnicodeData.txt to fix code ranges of CJK Ideograph Extension A and Extension B.

• tools/cldr2def.pl: Use eucJP for ja_JP ctypedef because eucJP is not compatible with UTF-8.

• tools/convert_map.pl: Add a verbose error message.

• tools/utf8-rollup.pl: Normalize entries to use Unicode, not UTF-8.

MFC r368404 by hrs:

Fix the source directory when installing the results. The install
target did not install them actually.