cad/linux-eagle5: Fix fetch error, mark deprecated

Details:

• Cadsoft, the EAGLE vendor, was acquired by Autodesk a while ago. The EAGLE 5 series was discontinued since, and is superseded by Autodesk EAGLE 9.
• Mark deprecated, scheduled for removal at the end of the 2022. Until then, the distfile remains available through a LOCAL mirror.

MFH: 2022Q2