test: repair PSRAL conformance baseline

[cpunion]

Fix the main-branch CI regression introduced when PR #35 added executable PSRAL coverage.

The PSRAL form was already present and classified as supported in every Go 1.20–1.27 official amd64 corpus. The new native-Go-vs-LLVM conformance case increases only runtime_verified_forms, from 34 to 35, for each supported Go version. PR #35 was merged while its post-push corpus jobs were still running, so the missing baseline update reached main and all stdlib-corpus jobs subsequently failed.

Validation:

• scripts/check-go-asm-coverage.sh (Go 1.27 locally)
• the PR matrix validates the same baseline against Go 1.20–1.27

This intentionally contains only the baseline repair; the external-library corpus and LLVM 22 migration remain in PR #38.

[fennoai]

Review

This is a data-only baseline update: runtime_verified_forms bumped 34 → 35 for all 8 amd64 entries (go1.20–go1.27) in testdata/coverage/go-asm-baseline.json.

Consistency checks (all pass):

• The bump is applied uniformly to every amd64 entry; other archs (arm64=62, others=0) are correctly untouched.
• Leaving coverage_fingerprint, supported_forms, unique_forms, and unsupported_forms unchanged is correct: RuntimeVerifiedForms is incremented independently of the status buckets and the fingerprint (form + status tuples) in cmd/plan9asmscan/main.go, so a form flipping to runtime-verified moves only this counter.

One inline finding (stale doc) noted below.

Notes (non-blocking):

• The baseline is a hand-maintained golden file with no automated regeneration/diff test tying it to scanner output (only the conformance manifest is guarded). Consider a golden -update mode so future bumps are self-verifying.
• Consider naming the specific newly runtime-verified form in the PR description so the 34 → 35 change is auditable without re-running the scanner.

No correctness, security, or performance issues found in the diff itself.

Additional findings

• doc/plan9asm-corpus.md:227: [P2] Stale runtime-verified count in doc table (still 34): The Go 1.27 snapshot table still lists the amd64 runtime verified column as 34, but this PR bumped runtime_verified_forms to 35 for go1.27/amd64 in testdata/coverage/go-asm-baseline.json — which this doc explicitly names as the authoritative machine-readable source. Update this cell to 35 to keep the doc consistent with the baseline.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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