Rollup merge of #63984 - cuviper:rust-installer-mem, r=Mark-Simulacrum

Update rust-installer to limit memory use

See https://github.com/rust-lang/rust-installer/pull/98 -- on a many-core machine, the xz memory for so many threads is more than a 32-bit process can handle. The xz stream is now limited to 8 threads.

r? @alexcrichton
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Mazdak Farrokhzad 2019-08-29 13:18:00 +02:00 committed by GitHub
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Subproject commit 85958b001dbff8523396809bfa844fc34a7869a8
Subproject commit 9f66c14c3f91a48a118c7817f434167b311c3515