This issue is to keep windows builders of rt to be informed about msys2 updates

Sometimes, I execute `pacman -Syu` in msys2 to check for updates. I don't check regularly but other windows builders also don't seem to check regularly. 

I suggest that each rt windows builder writes a short notice here if he detects some updates by executing `pacman -Syu` 

What do you think? @TooWaBoo @Hombre57 @Desmis @sguyader @gaaned92