LICENSE file clash with license directory on Windows

[vardlokkur]

          @siordache I have similar problem on windows, getting error:

* What went wrong:
Execution failed for task ':prepareMergedJarsDir'.
> Failed to copy C:\.........\build\jlinkbase\tmpjars\license\LICENSE to C:\................\build\jlinkbase\mergedjars\license\LICENSE due to C:\...............\build\jlinkbase\mergedjars\license\LICENSE

I tried:
jarExclude("**/license/**", "**/LICENSE*")
option for jlink task but it doesn't help at all :(
There is a file named LICENSE in target directory (mergedjars), and when your plugin tries to copy directory with license name it clashes with the existing file.

Originally posted by @vardlokkur in #186 (comment)

[vardlokkur]

The same problem can be observed on OSX with case-insensitive file system (default one)

[xzel23]

@vardlokkur can you provde a minimal example project (maybe a hello world on your GH) that reproduces the problem?