acct-user/sshd: add new user sshd

replacing addnewgroup with addnewuser in acct-user because we are
already adding new group sshd in acct-group/sshd.

BUG=b:150325755
TESTED=emerge-lakitu acct-user/sshd and manual ssh to gce instance

Change-Id: I9af61c3db67a03f4e677b05876877a0e94695cc0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2360097
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Varsha Teratipally <teratipally@google.com>
Commit-Queue: Varsha Teratipally <teratipally@google.com>
diff --git a/acct-user/sshd/sshd-0.0.1.ebuild b/acct-user/sshd/sshd-0.0.1.ebuild
index 6bac280..f76cefc 100644
--- a/acct-user/sshd/sshd-0.0.1.ebuild
+++ b/acct-user/sshd/sshd-0.0.1.ebuild
@@ -11,5 +11,5 @@
 # TODO(crbug/1026816): this is a placeholder (to satisfy Gentoo
 #  openssh dependencies) while acct-{group,user} are implemented.
 pkg_setup() {
-	enewgroup sshd
+	enewuser sshd
 }