[platform-swt-dev] disable loadLibrary call

["Erik Poupaert" <erik.poupaert@xxxxxxxxx>]

Another option to disable the loadlibrary call, would be to delay loading
the jni-library until the very first call, and add a boolean to the SWT
class that would be true by default, but that could be set to false.
Existing code would not be affected, while GCJ compiled code, could set the
boolean to false.