[clang] [flang] [flang] Add -mlink-builtin-bitcode option to fc1 (PR #94763)

[Mats Petersson via cfe-commits]

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Leporacanthicus wrote:

Would it be possible to generate this, rather than supply it as a binary - just out of safety-concerns with binaries, really.

I expect the contents isn't particularly complex or time-consuming to build.

https://github.com/llvm/llvm-project/pull/94763