packagegroup-self-hosted: update for strace

strace has been set imcompatible with riscv32, so update in
packagegroup-self-hosted.bb accordingly.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d326c561)
Signed-off-by: Steve Sakoman <steve@sakoman.com>