Log message:
*: remove pkg-config from tools where no buildlink3.mk file is included

Bulk build on NetBSD of these packages had the same result as before
(build succeeds, no PLIST change).

Log message:
*: recursive bump for perl 5.36

Log message:
devel: Add unibilium, based on the wip package 'libunibilium' with some
modifications.

Unibilium is a very basic terminfo library. It doesn't depend on curses or
any other library. It also doesn't use global variables, so it should be
thread-safe.