rustup shows timings on windows like "5.1334958959 mins"

[mark-summerfield]

Problem

When doing an update it shows times like this:
1.9 MiB / 8.5 MiB ( 22 %) 52.8 KiB/s ETA: 2.1394449869791665 min 8.36669921875 s

Surely this should be more like "2min 8sec"?

Steps

rustup update stable on Windows 7-64

Possible Solution(s)

Notes

Output of rustup --version: rustup 1.17.0 (069c88e 2019-03-05)
Output of rustup show:
V:>rustup show
Default host: x86_64-pc-windows-msvc

stable-x86_64-pc-windows-msvc (default)
rustc 1.33.0 (2aa4c46cf 2019-02-28)

[kinnison]

Fixed in #1699