hg: jdk/sandbox: 8213363: X25519 private key PKCS#8 encoding/decoding is incorrect

[chris.hegarty at oracle.com]

Changeset: 1092ba73cb2d
Author:    apetcher
Date:      2018-11-15 13:22 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/1092ba73cb2d

8213363: X25519 private key PKCS#8 encoding/decoding is incorrect
Summary: Fixed private key format to match spec in RFC 8410
Reviewed-by: mullan

! src/jdk.crypto.ec/share/classes/sun/security/ec/XDHPrivateKeyImpl.java
! test/jdk/sun/security/ec/xec/TestXDH.java
+ test/jdk/sun/security/ec/xec/XECKeyFormat.java