ruby: touch parse.c before make

Reinstated from an older version of the recipe.

dev-lang/ruby/ruby-3.2.7.recipe

@@ -113,6 +113,8 @@ BUILD()
 		--with-ridir=$docDir/ri \
 		--with-dbm-type=gdbm_compat
 
+	touch parse.c # otherwise BASERUBY will be required
+
 	# The build process needs to run ruby, and without this it fails to find
 	# libruby.so.
 	export LIBRARY_PATH=$LIBRARY_PATH:%A