hg: jigsaw/jake/jdk: Separate BasicImageReader::getNativeMap to avoid eager loading of libjimage

[mandy.chung at oracle.com]

Changeset: 549e0f5168ff
Author:    mchung
Date:      2016-01-06 15:15 -0800
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/549e0f5168ff

Separate BasicImageReader::getNativeMap to avoid eager loading of libjimage

! make/mapfiles/libjimage/mapfile-vers
! src/java.base/share/classes/jdk/internal/jimage/BasicImageReader.java
+ src/java.base/share/classes/jdk/internal/jimage/NativeImageBuffer.java
- src/java.base/share/native/libjimage/BasicImageReader.cpp
+ src/java.base/share/native/libjimage/NativeImageBuffer.cpp