Please review this fix of a merge error in the package-info for java.lang.ref.
This is a doc-only change; per the RDP1 process the CR has been labeled "noreg-doc". CR: https://bugs.openjdk.java.net/browse/JDK-8165393 Webrev: http://cr.openjdk.java.net/~kbarrett/8165393/webrev/
