RFR: JDK-8227172: revert JDK-8225569 on windows

[Andy Herrick]

Please review the jpackage fix for bug [1] at [2].

This is a fix for the JDK-8200758-branch branch of the open sandbox 
repository (jpackage).

This change will remove the "bin" directory on windows and revert to 
putting the executable(s) directly in output root dir. (<output 
dir>/<app name>)

[1] https://bugs.openjdk.java.net/browse/JDK-8227172

[2] http://cr.openjdk.java.net/~herrick/8227172/webrev.01/

/Andy