RFR JDK-8172414: jshell not working in exploded JDK build

[Jan Lahoda]

Hi,

Currently, seems that jshell cannot be run on an exploded build:
https://bugs.openjdk.java.net/browse/JDK-8172414

The reason appears to be an unconditional use of jrt URL, maybe just 
using Class.getResource(AsStream) would work?

http://cr.openjdk.java.net/~jlahoda/8172414/webrev.00/

Thanks,
     Jan