Log message:
Simply and speed up buildlink3.mk files and processing.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.

Log message:
Suppress to do 'modify-itlocaledir' command in configure script.
No need, done by pkgsrc USE_LOCALEDIR feature.

modify-itlocaledir expet GNU sed (options and patterns).
Folliwing situations rise PLIST mismatch:
 * using GNU sed, PKGLOCALEDIR != share
 * sed accept options, but can't interprete patterns as expected. PR 38847.

Bump PKGREVISION.

Log message:
Fixes build failure on no sys_errlist[] platforms.

Log message:
Import Tomoe version 0.6.0.

Tomoe is originally a handwriting character recognition engine.

Current Tomoe does not only provide handwriting recognition engine but also
provide other character searching API such as searching by readings, stroke
counts, radicals, valiations and so on.