bootstrap-update: Added "extra" to the list of directories to remove

The directory "extra" was created in the agent, and needs to be removed
before replacing the new agent during the upgrade process.

Signed-off-by: Ricardo Tavares de Oliveira <rto07@c3sl.ufpr.br>
Signed-off-by: Vinicius Kwiecien Ruoso <vkr07@c3sl.ufpr.br>

bootstraps/bootstrap-update

@@ -134,7 +134,7 @@ mv -f "${SEED_MEC_HOME}/update/tmp/SEED2-run/"{.md5*,.back*}* \
       "${SEED_MEC_HOME}/SEED2/"
 
 # The files itself
-rm -rf "${SEED_MEC_HOME}/SEED2/"{bin,lib,net,client,scripts} &>/dev/null
+rm -rf "${SEED_MEC_HOME}/SEED2/"{bin,lib,net,client,scripts,extra} &>/dev/null
 mv -f "${SEED_MEC_HOME}/update/tmp/SEED2-run/"* \
       "${SEED_MEC_HOME}/SEED2/"