when publishing target platforms and update sites that replace themselves, use --del to remove IUs that are no longer in the repo

Just pushed an update to JBT EA site, and it includes:

[ ]	angularjs-eclipse-feature_0.9.0.201504121519.jar	04-Jun-2015 16:12 	14K
[ ]	angularjs-eclipse-feature_0.10.0.201506020622.jar	10-Jun-2015 16:25 	14K

instead of just the new 0.10.0 feature.

Solution:

either delete the whole target folder BEFORE rsyncing, or pass in -del to rsync to CAREFULLY remove target files as we push.