Jessica Clarke e5f5b6a75c .github: Attempt to un-break Clang 9 action ... GitHub removed Clang 9 from the 20.04 image[1], breaking this build. Thus, manually add the specific versioned packages we need for the Ubuntu jobs to ensure they're installed. Note that we don't do the same for macOS, as Homebrew does not allow multiple llvm@N to co-exist, giving an error if you attempt to install a second one. In practice we don't actually use the compiler field here for anything other than the build name, it's only the cross-bindir that matters, so when it eventually moves to 12 the name will get confusing but the job will still work. MFC after: immediately [1] 15a610677b		2021-05-29 04:36:36 +01:00
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cross-bootstrap-tools.yml	.github: Attempt to un-break Clang 9 action	2021-05-29 04:36:36 +01:00