cmd/go/internal/work: accept -fexcess-precision=<style> compiler flags

[saphirion-ab]

Fixes #80304.

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Patch Set 1:

(1 comment)

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Message from Andreas Bolka:

Patch Set 1:

(2 comments)

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Message from Ian Lance Taylor:

Patch Set 1: Code-Review+2 Commit-Queue+1

(1 comment)

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Patch Set 1:

Dry run: CV is trying the patch.

Bot data: {"action":"start","triggered_at":"2026-07-08T20:02:00Z","revision":"8a55379b204a8a494a074d36bde60b164bd51487"}

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Message from Ian Lance Taylor:

Patch Set 1: -Commit-Queue

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Patch Set 1: LUCI-TryBot-Result+1

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