hg: lambda/lambda/jdk: Add no-args constructors along with docs of same.

[mike.duigou at oracle.com]

Changeset: d5a5b70d06d2
Author:    mduigou
Date:      2013-04-15 19:22 -0700
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/d5a5b70d06d2

Add no-args constructors along with docs of same.

! src/share/classes/java/util/DoubleSummaryStatistics.java
! src/share/classes/java/util/IntSummaryStatistics.java
! src/share/classes/java/util/LongSummaryStatistics.java