[sugar] Etoys needs reconfiguring in jhbuild

[Bert Freudenberg]

If you update etoys in jhbuild you might encounter a problem in "make  
install". Just choose to go to the configuring stage again.

Alternatively, build etoys once using the -a build option:

	sugar-jhbuild buildone -a etoys

The reason is that Makefile.in changed recently but this change was  
not picked up automatically by the build system. I added a rule to  
hopefully automate this in the future.

- Bert -