hg: jdk/sandbox: 8216172: File.renameTo(File dest) should check for NPE at the very beginning

[chris.hegarty at oracle.com]

Changeset: e348b0160d61
Author:    bpb
Date:      2019-01-11 08:20 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e348b0160d61

8216172: File.renameTo(File dest) should check for NPE at the very beginning
Reviewed-by: lancea

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