hg: jdk/sandbox: 8191706: Add Reader::transferTo(Writer)

[chris.hegarty at oracle.com]

Changeset: 50ddd5e1ede1
Author:    bpb
Date:      2017-12-06 14:39 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/50ddd5e1ede1

8191706: Add Reader::transferTo(Writer)
Reviewed-by: alanb, bpb, briangoetz
Contributed-by: Patrick Reinhart <patrick at reini.net>

! src/java.base/share/classes/java/io/Reader.java
+ test/jdk/java/io/Reader/TransferTo.java