Log Message:
* Convert to use the pkgsrc emulator framework.  This allows NetBSD/amd64
  to install and use this NetBSD/i386 JRE/JDK distribution.

* Make the scsl-* packages look more like the sun-* JRE and JDK packages.

* The scsl-jre15 package was built on NetBSD-2.0.x and needs libstdc++.5.0,
  so require netbsd>=2.0.  Bump the PKGREVISION of scsl-jre15 to 1 to
  reflect the potential new dependencies on the compat20 and compat30
  packages.  This addresses part of PR pkg/36797.