[MERGE] Workaround for running `make exe` second time: remove all compiled extensions because they will be recompiled anyway.

[Martin Pool]

Martin Pool has voted approve.
Status is now: Approved


For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3Cgvos1n%2457g%241%40ger.gmane.org%3E
Project: Bazaar