Add support to compile task on Gradle with Java 10

[jeandersonbc]

Related to #138

Currently unable to compile classes but I haven't added compile args at the moment.

[jeandersonbc]

@gayanW I was checking these changes for reference: #28

I made some progress regarding those "package ... is declared in module ... which does not export it to unanmed module)"-like errors but I hitting another compilation error:

/tmp/src/classes/gov/nasa/jpf/SerializationConstructor.java:23: error: cannot inherit from final Constructor
public class SerializationConstructor<T> extends Constructor<T> {
                                                 ^
/tmp/src/classes/gov/nasa/jpf/SerializationConstructor.java:23: error: constructor Constructor in class Constructor<T#2> cannot be applied to given types;
public class SerializationConstructor<T> extends Constructor<T> {
       ^
  required: Class<T#1>,Class<?>[],Class<?>[],int,int,String,byte[],byte[]
  found: no arguments
  reason: actual and formal argument lists differ in length
  where T#1,T#2 are type-variables:
    T#1 extends Object declared in class SerializationConstructor
    T#2 extends Object declared in class Constructor
2 errors

The class Constructor from src/classes/modules/java.base/java/lang/reflect/Constructor.java is right. Therefore, I'm guessing this error is happening because the module java.base has to be compiled first.

Did you have this error when you were doing this change?

(cc @cyrille-artho @wvisser)

[gayanW]

It is needed that we patch java.lang.reflect.Constructor with our MJI model class for Constructor, which is not final.

<compilerarg value="--patch-module"/>
<compilerarg value="java.base=src/classes/modules/java.base"/>

[jeandersonbc]

Great. I'm still getting how Jigsaw works but feels like we are in the right direction...

[jeandersonbc]

Still struggling to compile the modules on Gradle. I tried some alternatives from https://guides.gradle.org/building-java-9-modules but didn't work as expected.

It is like adding --patch-module doesn't have any effect.
I tried to compile the modules first but, again, it didn't work.
I need to debug the Gradle execution to understand what's happening because I'm able to compile the modules via command-line with the JDK only.

[cyrille-artho]

Resolved as part of PR#210.