Do not create a junction (soft link) for files

[emtenet]

When rlx_util:symlink_or_copy/2 cannot use file:make_symlink/2 on Windows due to the
user lacking SeCreateSymbolicLinkPrivilege it tries a fall back.

The fall back is to create a junction with the mklink command. Junctions only work for directories but the mklink creates one anyway.

Any attempt to access the junction as a file (like intended) results in Access is denied.

Trying to run a release with vm.args created this way silently fails (not even a erl_crash.dump file)

[helloyan]

I face the problem when develop in windows

In E:\Dev\DM\change_cs_build\default\rel\change_cs\releases\0.1.0
dir shows
2017/01/08 21:09 vm.args [e:\Dev\DM\change_cs\config\vm.args]

the link of vm.args is a directory but link to a file , so it can't run