Fix CST100Starliner install

[HebaruSan]

Problem

Cause

The ZIP contains a Ships folder with one craft file in it, with no VAB or SPH subfolder.

Metadata:

        "find":       "Ships",
        "install_to": "Ships",
        "as":         "VAB"

Mod version	Ships folder path in ZIP
2.0	/CST-100 Starliner/Ships/
2.1	/Ships/

The as property isn't allowed if the install stanza is trying to install just Ships in the root of the ZIP. The reason for this is a bit fishy but also somewhat complex to sort out.

Changes

We could monkey with the C# code (and still may), but that won't help users trying to install this with the current client. So now we match the file instead of the folder.