On Fedora 33+, there is a buggy package that installs to
`/usr/lib64/clang/{version}/lib`, even on 32-bit systems. The original
code sees the `/usr/lib64/clang/{version}` directory, checks for an
`include` subdirectory, and then gives up because it doesn't exist.
To be more robust, check both `/usr/lib64/clang/{version}/include` and
`/usr/lib/clang/{version}/include`, and only allow versions that match
the LLVM major version used to build tinygo.
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