hg: jdk9/sandbox/jdk: 7086489: File.lastModified should accuracy as well as resolution

[chris.hegarty at oracle.com]

Changeset: 93b0c398e243
Author:    bpb
Date:      2017-05-17 14:29 -0700
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/93b0c398e243

7086489: File.lastModified should accuracy as well as resolution
Summary: Add an @apiNote indicating that the last-modified time might be of coarser than millisecond granularity.
Reviewed-by: smarks

! src/java.base/share/classes/java/io/File.java