CondFormats/EgammaObjects: add missing dependency on roottmva

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Merge pull request #2433 from davidlt/add-missing-dep-on-roottmva

gcc 4.9.0 -- CondFormats/EgammaObjects: add missing dependency on roottmva