[9] RFR(L) 8166415: Integrate AOT tool JAOTC

[Vladimir Kozlov]

AOT JEP:
https://bugs.openjdk.java.net/browse/JDK-8166089
Subtask:
https://bugs.openjdk.java.net/browse/JDK-8166415
Webrev:
http://cr.openjdk.java.net/~kvn/aot/jaotc.webrev/

Please, review implementation of jaotc - Java Ahead-Of-Time static compiler. It produces native code for compiled java methods. It uses Graal as the code-generating backend and libelf for generating 
shared .so AOT libraries. It is written mostly in java. Code interface to libelf is written in C.

Only Linux/x64 platform is supported. 'jaotc' and AOT part of Hotspot will be build only on Linux/x64.

Corresponding build changes are reviewed in a separate thread for https://bugs.openjdk.java.net/browse/JDK-8166416

http://cr.openjdk.java.net/~kvn/aot/top.webrev/
http://cr.openjdk.java.net/~kvn/aot/jdk.webrev/
http://cr.openjdk.java.net/~kvn/aot/hs.make.webrev/

Thanks,
Vladimir