devel/radare2: Upgrade version 0.9.6 => 0.9.8, reset maintainership

The maintainer has never been active since the port was imported in 2011,
and has two consecutive timeouts and didn't stage the port. These are
the reasons behind the reset.

PR: 196347
Submitted by: oleksii.tsai (gmail)
Approved by: former maintainer timeout