libmps: build both Release and Debug versions

[nailuoGG]

Change list:

• Adopt single compilation flow for all platforms (macOS/Linux)
• Always produce release (libmps.a) and debug (libmps-debug.a) variants
• Remove platform-specific build branches

brew install libmps

result:

 cd $(brew --prefix libmps)

➜ tree
.
├── INSTALL_RECEIPT.json
├── include
│   ├── mps.h
│   ├── mpsacl.h
│   ├── mpsavm.h
│   ├── mpscamc.h
│   ├── mpscams.h
│   ├── mpscawl.h
│   ├── mpsclo.h
│   ├── mpscmfs.h
│   ├── mpscmv2.h
│   ├── mpscmvff.h
│   ├── mpscmvt.h
│   ├── mpscsnc.h
│   ├── mpsio.h
│   ├── mpslib.h
│   ├── mpstd.h
│   └── mpswin.h
├── lib
│   ├── libmps-debug.a
│   └── libmps.a
├── license.txt
├── readme.txt
├── release.rst
└── sbom.spdx.json

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

[nailuoGG]

This change builds release and debug versions together.

It’s not standard but helps when debug symbols are needed (like crash analysis).

[SMillerDev]

I don't think we want to build debug versions, or have the build depend on a handcrafted compiler invocation.

[nailuoGG]

I don't think we want to build debug versions, or have the build depend on a handcrafted compiler invocation.

Thanks for the feedback:

1. Only release builds will stay in future versions.
2. The custom script follows MPS's docs:
   "CONFIGURE/MAKE IS NOT THE BEST WAY TO BUILD THE MPS"
   (see their guide). and alert in configure.ac

Happy to follow both Homebrew-core and MPS's rules. Let me know if there's a simpler way to do this.