build

fix sign for `__pairs` #4351

Job	Run time
compile (ubuntu-22.04, linux, linux-x64, alpine:latest, musl)	4m 3s
compile (ubuntu-20.04, linux, linux-x64)	6m 5s
compile (ubuntu-20.04, linux, linux-arm64)	3m 53s
compile (macos-latest, darwin, darwin-x64)	2m 23s
compile (macos-latest, darwin, darwin-arm64)	2m 39s
compile (windows-latest, windows, win32-ia32)	4m 3s
compile (windows-latest, windows, win32-x64)	3m 42s
	26m 48s

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