hg: jigsaw/jake/hotspot: Rename extension class loader to platform class loader

[mandy.chung at oracle.com]

Changeset: 3c73a6ce4fc9
Author:    mchung
Date:      2016-03-14 10:42 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jake/hotspot/rev/3c73a6ce4fc9

Rename extension class loader to platform class loader

! src/share/vm/classfile/classFileParser.cpp
! src/share/vm/classfile/classLoader.cpp
! src/share/vm/classfile/classLoader.hpp
! src/share/vm/classfile/classLoaderData.cpp
! src/share/vm/classfile/classLoaderData.hpp
! src/share/vm/classfile/systemDictionary.cpp
! src/share/vm/classfile/systemDictionary.hpp
! src/share/vm/classfile/vmSymbols.hpp
! src/share/vm/oops/method.cpp