hg: jigsaw/jake/jdk: Move and refactor defineSystemPackage to BootLoader

[mandy.chung at oracle.com]

Changeset: 5726c8dcbfde
Author:    mchung
Date:      2016-01-28 13:51 -0800
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/5726c8dcbfde

Move and refactor defineSystemPackage to BootLoader

! src/java.base/share/classes/java/lang/ClassLoader.java
! src/java.base/share/classes/java/lang/System.java
! src/java.base/share/classes/jdk/internal/misc/BootLoader.java
! src/java.base/share/classes/jdk/internal/misc/BuiltinClassLoader.java
! src/java.base/share/classes/jdk/internal/misc/JavaLangAccess.java