Update jemalloc to 4.0.3

[fbernier]

Follow-up from #29196

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @alexcrichton (or someone else) soon.

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[alexcrichton]

@bors: r+ 4b51d9c

Thanks!

[bors]

⌛ Testing commit 4b51d9c with merge eb400f6...

[alexcrichton]

@bors: retry force

[bors]

⌛ Testing commit 4b51d9c with merge 2731da0...

[bors]

💔 Test failed - auto-win-gnu-32-opt

[alexcrichton]

Hm that looks eerily similar to the bug from last time, but perhaps we can retry and see if it shows up twice!

@bors: retry

[bors]

⌛ Testing commit 4b51d9c with merge 07fc58b...

[bors]

💔 Test failed - auto-win-gnu-32-nopt-t

[fbernier]

Nondeterministic failures on Windows when using threads 😞 . This is not going to be easy to debug...

[alexcrichton]

Closing due to inactivity, but hopefully a future version of jemalloc will fix these issues!