meson_options: fix bool options

meson_options.txt

@@ -14,7 +14,7 @@ option('with_wayland', type : 'feature', value : 'disabled')
 option('with_dbus', type : 'feature', value : 'enabled')
 option('with_dlsym', type : 'feature', value : 'disabled')
 option('loglevel', type: 'combo', choices : ['trace', 'debug', 'info', 'warn', 'err', 'critical', 'off'], value : 'info', description: 'Max log level in non-debug build')
-option('mangoapp', type: 'boolean', value : 'false')
-option('mangohudctl', type: 'boolean', value : 'false')
-option('mangoapp_layer', type: 'boolean', value : 'false')
+option('mangoapp', type: 'boolean', value : false)
+option('mangohudctl', type: 'boolean', value : false)
+option('mangoapp_layer', type: 'boolean', value : false)
 option('tests', type: 'feature', value: 'auto', description: 'Run tests')