meson: Specify encoding to UTF-8 when building with MSVC
Use build arguments consistent with core and -base. This can also remove noisy "C4819" warning of non-us locale MSVC.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Use build arguments consistent with core and -base. This can also remove noisy "C4819" warning of non-us locale MSVC.