Integrate JDK build changes and launcher 'jaotc' for AOT compiler

We need to add changes to JDK build to build JAOTC module.

And we need a launcher for the AOT compiler. Basically, it should be doing what the jaotc script is doing today.

Main class: com.oracle.graal.aot.Main
Java options:
        -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI \
        -XX:+UseAOT \
        -Djvmci.UseProfilingInformation=false \
        -Dgraal.UseExceptionProbability=false \
        -Djvmci.Compiler=graal \
        -Dgraal.IgnoreJVMCIVersionCheck=true

This launcher should only be generated on linux-x64, the only supported by AOT platform in JDK9.