hg: tiered-attrib/dev/langtools: create a separate method for generating return constraints for lambda expressions

[vicente.romero at oracle.com]

Changeset: de0d960b4b7e
Author:    vromero
Date:      2015-06-09 16:29 -0700
URL:       http://hg.openjdk.java.net/tiered-attrib/dev/langtools/rev/de0d960b4b7e

create a separate method for generating return constraints for lambda expressions

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java