meson: Do not allow static MSVC-style builds
meson: Do not allow static MSVC-style builds

The Visual Studio build files never really supported static builds, so
disallow that for now, until we can make sure that is tested better.

GNOME/glibmm,GNOME/glibmm,GNOME/glibmm,GNOME/glibmm,GNOME/glibmm