Rollup merge of #73999 - eddyb:svv-prereq, r=Mark-Simulacrum

Bump mingw-check CI image from Ubuntu 16.04 to 18.04.

I chose 18.04 because we use it for other builders, and it's enough to get a version of MinGW that can build `libssh2-sys`.

This is a prereq for #73902, where `libssh2-sys` shows up as an indirect dependency of `x.py check src/tools/semverver` (through `src/tools/cargo`, which we don't currently `x.py check` because it's not in-tree). See also https://github.com/rust-lang/rust/pull/73902#issuecomment-652414502.

r? @Mark-Simulacrum cc @mati865
This commit is contained in:
Manish Goregaokar 2020-07-03 17:17:10 -07:00 committed by GitHub
commit d69a8468fa
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@ -1,4 +1,4 @@
FROM ubuntu:16.04
FROM ubuntu:18.04
RUN apt-get update && apt-get install -y --no-install-recommends \
g++ \