[clang] [clang][MBD] set up module build daemon infrastructure (PR #67562)
https://github.com/cpsughrue created https://github.com/llvm/llvm-project/pull/67562 The module build daemon (mbd) will be a cc1 tool that helps convert implicit module command lines to explicit module command lines. The basic workflow is as follows: A clang invocation will check whether a
