Build

Bump tracing from 0.1.38 to 0.1.39 #2504

Job	Run time
mac (stable, x86_64-apple-darwin)	13m 47s
windows (stable, x86_64-pc-windows-gnu)	5m 7s
mac (nightly, x86_64-apple-darwin)	16m 39s
linux (stable, i686-unknown-linux-gnu)	6m 24s
windows (stable, x86_64-pc-windows-msvc)	6m 4s
linux (stable, i686-unknown-linux-musl)	6m 26s
windows (nightly, x86_64-pc-windows-gnu)	10m 39s
linux (stable, x86_64-unknown-linux-gnu)	6m 21s
windows (nightly, x86_64-pc-windows-msvc)	8m 27s
linux (stable, x86_64-unknown-linux-musl)	7m 26s
linux (stable, aarch64-unknown-linux-gnu)	8m 33s
linux (beta, i686-unknown-linux-gnu)	7m 34s
linux (beta, i686-unknown-linux-musl)	7m 15s
linux (beta, x86_64-unknown-linux-gnu)	8m 41s
linux (beta, x86_64-unknown-linux-musl)	8m 42s
linux (beta, aarch64-unknown-linux-gnu)	7m 28s
linux (nightly, i686-unknown-linux-gnu)	7m 46s
linux (nightly, i686-unknown-linux-musl)	9m 13s
linux (nightly, x86_64-unknown-linux-gnu)	7m 22s
linux (nightly, x86_64-unknown-linux-musl)	8m 12s
linux (nightly, aarch64-unknown-linux-gnu)	7m 36s
	2h 55m 42s

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