Avoid hardcoding core-oj.jar path

[vvb2060]

No description provided.

[vvb2060]

Ljava/lang/reflect/Executable;->artMethod:J,unsupported
Ljava/lang/reflect/Executable;->declaringClass:Ljava/lang/Class;,lo-prio,max-target-o
Ljava/lang/invoke/MethodHandle;->artFieldOrMethod:J,lo-prio,max-target-o
Ljava/lang/Class;->methods:J,lo-prio,max-target-o
Ljava/lang/Class;->iFields:J,lo-prio,max-target-o
Ljava/lang/Class;->sFields:J,lo-prio,max-target-o

only Ljava/lang/reflect/Executable;->artMethod:J may change

[aviraxp]

release 6.0？