[TIMOB-14189] Build: Files imported as links are not included in the build

Problem description

Importing a file as link does not work when building the application. The files are not copied in the build.

Steps to reproduce

1) Create a folder outside the project directory, with a file named 'main.js' that has the following content:

export.testfunction = function() {
    alert("MAIN");
}

2) Create a new application with this code:

var main = require('shared/main');
main.testfunction();

3) Create a directory in Resources, e.g. 'shared' 4) Right click on the folder, and choose 'Import...' 5) Choose General/Filesystem and select the folder created in #1 6) Select the file, and choose the options 'Create links in workspace', 'Create virtual folders' and 'Create link locations relative to PROJECT_LOC' 7) Build the app - the module won't be found