Fix building and testing on FreeBSD; Add FreeBSD platform support#8193

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michael-yuji wants to merge 8 commits intoswiftlang:mainfrom michael-yuji:freebsd-wip

+159-29

Commits on Jan 30, 2025

check linker settings by triples' object format instead of os name
michael-yuji
committed

Commits on Feb 1, 2025

fallback to default case instead of listing all of them
michael-yuji
committed

Commits on Feb 2, 2025

make FreeBSD triple unversioned
michael-yuji
committed