Initialize structure since LTO seems to complain about it.
Add a few more libraries to the big plugin.

Big plugins is extremely sensible to the order in which libraries get
loaded and to the fact that a small plugin could bring in libraries
which are already part of the big plugin. This should fix the errors
seen in the IBs.
Force rebuild.

Force rebuild of packages added to big libs because checkdeps is not
smart enough (yet) to check them out autonoumously.
Merge pull request #4769 from ktf/fix-lto-issues

Various fixes for big plugins.
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X