ci-build: Update required MSYS packages
The older versions we were previously building against are no longer available on mirrors.
Based on changes proposed in !189 (merged) by Arnout Engelen, and the package list gathered by Ralf Habacker in #318 (closed).
Resolves: #318 (closed)
Signed-off-by: Simon McVittie smcv@collabora.com
/cc @raboof @rhabacker