hook up tracing to cg_cranelift #1063

Job	Run time
abi_cafe (macos-latest, aarch64-apple-darwin)	7m 7s
abi_cafe (macos-latest, x86_64-apple-darwin)	14m 24s
abi_cafe (ubuntu-latest, x86_64-unknown-linux-gnu)	3m 11s
abi_cafe (windows-latest, x86_64-pc-windows-msvc)	6m 0s
	30m 42s

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