build: Fix Meson warnings

WARNING: Running the setup command as meson [options] instead of meson setup [options] is ambiguous and deprecated.

DEPRECATION: c_args in the [properties] section of the machine file is deprecated, use the [built-in options] section.

DEPRECATION: c_link_args in the [properties] section of the machine file is deprecated, use the [built-in options] section.

bootstrap.sh

@@ -7,7 +7,7 @@ test -d build/ && rm -r build/
 # Get external libs (MicroPython, tiny-AES-c, SHA256)
 git submodule deinit --all
 git submodule update --init ./lib
-meson --cross-file card10-cross.ini build/ "$@"
+meson setup --cross-file card10-cross.ini build/ "$@"
 
 set +x