hg: jdk8/tl/jdk: 4641897: Faster string conversion of large integers

[alan.bateman at oracle.com]

Changeset: 01fcca3d2b8c
Author:    bpb
Date:      2013-06-20 12:15 -0700
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/01fcca3d2b8c

4641897: Faster string conversion of large integers
Summary: Accelerate conversion to string by means of Schoenhage recursive base conversion.
Reviewed-by: bpb, alanb
Contributed-by: Alan Eliasen <eliasen at mindspring.com>

! src/share/classes/java/math/BigInteger.java
! test/java/math/BigInteger/BigIntegerTest.java