Update CPE Prefix to openbsd:openssh for openssh

Vomit does not issue CVE alert for openssh. From
https://vomit.googleplex.com/advisory?id=CVE%2fCVE-2018-15473
openssh:openssh is not there.

BUG=b:153452702
TEST=None

Change-Id: Ide9e45bd46e90b23f4b6f98054c4b749bf71cc01
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2141632
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Roy Yang <royyang@google.com>
diff --git a/net-misc/openssh/metadata.xml b/net-misc/openssh/metadata.xml
index 7613265..82a556e 100644
--- a/net-misc/openssh/metadata.xml
+++ b/net-misc/openssh/metadata.xml
@@ -35,7 +35,7 @@
     <flag name="xmss">Enable XMSS post-quantum authentication algorithm</flag>
   </use>
   <upstream>
-    <remote-id type="cpe">cpe:/a:openssh:openssh</remote-id>
+    <remote-id type="cpe">cpe:/a:openbsd:openssh</remote-id>
     <remote-id type="sourceforge">hpnssh</remote-id>
   </upstream>
 </pkgmetadata>