CI: Make sure we use meson 0.49.2 in MSYS2
pip in MSYS2 seems to install scripts into $USERPROFILE instead of $HOME which means the MSYS2 meson, which is newer, wins. Make sure $USERPROFILE is in PATH as well.
pip in MSYS2 seems to install scripts into $USERPROFILE instead of $HOME which means the MSYS2 meson, which is newer, wins. Make sure $USERPROFILE is in PATH as well.