Baselibs 8.4.0

This is a bugfix release of Baselibs. It is given a minor number bump as v8.2 and v8.3 were broken due to a bad GNUmakefile merge which removed the build of FMS and libyaml.

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From CHANGELOG.md

Fixed

• Restore FMS build (was erroneously removed in 8.2.0)
• Fixes for MPT and using icx/icpx at NAS

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What's Changed

• Fixes for icx at NAS with MPT by @mathomp4 in #213
• Fix missing FMS in GNUmakefile by @mathomp4 in #214

Full Changelog: v8.3.1...v8.4.0