www-plugins/passff-host: Install to firefox-bin dir

www-plugins/passff-host: Install to firefox-bin dir

Firefox's directory for native messaging hosts is a compile-time
variable. www-client/firefox-bin is set to a directory under /usr/lib/,
while www-client/firefox varies. This -r1 bump will install passff-host
to both locations so that both firefox and firefox-bin are able to
locate the plugin.

Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Lucian Poston <lucianposton@pm.me>
Closes: https://bugs.gentoo.org/687746
Closes: https://github.com/gentoo/gentoo/pull/14632
Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>