update LLVM docs (#56162)
dump with raw=true so you don't get random erorrs, and show how to run
single modules.
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Co-authored-by: Valentin Churavy <vchuravy@users.noreply.github.com>
Co-authored-by: Mosè Giordano <765740+giordano@users.noreply.github.com>
Co-authored-by: Jameson Nash <vtjnash@gmail.com>