[flang-commits] [flang] [flang] Add install target to install flang headers (PR #78151)

[David Truby via flang-commits]

https://github.com/DavidTruby approved this pull request.

Do we need a target to only install the driver? I think we should match clang and install everything relevant under `install-flang`. In that case `install-flang-new` could be renamed to `install-flang-driver` in case anyone wants only the driver.

Regardless, that's somewhat a separate conversation. This change looks good to me!

https://github.com/llvm/llvm-project/pull/78151