hg: jdk9/sandbox/jdk: 8152108: Correct jarsigner warning message about missing timestamp

[chris.hegarty at oracle.com]

Changeset: 0b5451e5361e
Author:    weijun
Date:      2016-06-01 15:35 +0800
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/0b5451e5361e

8152108: Correct jarsigner warning message about missing timestamp
Reviewed-by: mullan

! src/jdk.jartool/share/classes/sun/security/tools/jarsigner/Resources.java
! test/sun/security/tools/jarsigner/warnings/Test.java