Comment 3 for bug 1628098

From https://github.com/snapcore/snapcraft/blob/master/docs/snapcraft-syntax.md:

"organize (yaml subsection) A dictionary exposing replacements, the key is the internal name whilst the value the exposed name, filesets will refer to the exposed named applied after organization is applied."

Note that filesets are made to be used in stage/prime filters so they must refer to the organized names.