[9] RFR(M) 8166416: [AOT] Integrate JDK build changes and launcher 'jaotc' for AOT compiler

[Vladimir Kozlov]

AOT JEP:
https://bugs.openjdk.java.net/browse/JDK-8166089
Subtask:
https://bugs.openjdk.java.net/browse/JDK-8166416
Webrev:
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/

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

Changes include new 'jaotc' launcher, makefile changes to build jdk.vm.compiler (Graal) and jdk.aot modules used by 'jaotc'.
Both modules sources are located in Hotspot: hotspot/src/jdk.aot and hotspot/src/jdk.vm.compiler.
'jaotc' requires installed libelf package on a system to build native part of 'jaotc'. It is used to generated AOT shared libraries (.so) as result of AOT compilation.

Hotspot makefile changes will be pushed together with Hotspot AOT changes.

Thanks,
Vladimir