RFR: 8087181: Move native jimage code to its own library (maybe libjimage) (against hs-rt)

[Jim Laskey (Oracle)]

https://bugs.openjdk.java.net/browse/JDK-8087181 <https://bugs.openjdk.java.net/browse/JDK-8087181>

http://cr.openjdk.java.net/~jlaskey/hs-rt/webrev-top
http://cr.openjdk.java.net/~jlaskey/hs-rt/webrev-jdk
http://cr.openjdk.java.net/~jlaskey/hs-rt/webrev-hotspot