Revert "build library example right away"
Revert "build library example right away"

This reverts commit 4d0f1b37b5518901127e6a534e008d39d6a943fd.

LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples