appveyor: Use Python3.
authorJose Fonseca <jfonseca@vmware.com>
Tue, 4 Aug 2020 13:16:37 +0000 (14:16 +0100)
committerMarge Bot <eric+marge@anholt.net>
Thu, 6 Aug 2020 09:46:48 +0000 (09:46 +0000)
commite2c614a415b9ac65fe5510a156b42d7c005b1208
tree16c2e7e464275943684a6f4d9f01a654c8639ade
parent0f9fb7ffaae7f154fb996682a61e7293d0babc6f
appveyor: Use Python3.

This implied upgrading to the Visual Studio 2019 image, not for VS
itself, but for the newer Python 3.8.5 version it contains, to avoid
UnicodeDecodeError inside modulefinder module when attempting to decode
our UTF-8 encoded Python scripts with cp1252 encoding.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6184>
.appveyor/appveyor_msvc.bat
appveyor.yml