[codex] Normalize PSP archive metadata

[doodlewind]

Summary

Normalize generated PSP archive objects before packaging PSPDEV builds.

The clang-built SDK archives currently expose two issues when linked by rust-lld from rustc's current mipsel-sony-psp target:

• local STT_FILE symbols in archive members can trip symbol has invalid binding: 0
• clang emits MIPS metadata such as machine-extension/single-float flags, while rustc's PSP target and the legacy SDK emit the metadata shape rust-lld accepts for this target

This script runs after the normal SDK build steps and before CI packaging. It strips only STT_FILE symbols and normalizes MIPS ELF metadata to match rustc/legacy PSP SDK objects: MIPS2 O32, no machine extension, hard-float double ABI metadata.

Validation

• bash -n scripts/006-normalize-llvm-psp-archives.sh
• Ran the script against a copied clang-built PSP SDK archive tree.
• Verified libc.a(libc_a-abort.o) no longer contains STT_FILE symbols and reports Flags: 0x10001001, noreorder, o32, mips2 plus FP ABI: Hard float (double precision).
• Used the normalized SDK locally in Dreamcart: env -u PSPJS_SUPPRESS_LINKER_MESSAGES bun play psp adventure3d built EBOOT.PBP with no linker warnings/errors.