hg: jdk9/sandbox/jdk: 4851777: Add BigDecimal sqrt method

[chris.hegarty at oracle.com]

Changeset: 116ec1a1a1ff
Author:    darcy
Date:      2016-05-20 15:34 -0700
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/116ec1a1a1ff

4851777: Add BigDecimal sqrt method
Reviewed-by: bpb

! src/java.base/share/classes/java/math/BigDecimal.java
+ test/java/math/BigDecimal/SquareRootTests.java