D24465: Use ECMGenerateExportHeader to manage deprecated API better

[David Faure]

dfaure added a comment.


  +1 from me

REPOSITORY
  R278 KWindowSystem

REVISION DETAIL
  https://phabricator.kde.org/D24465

To: kossebau, #frameworks, #kwin, dfaure, zzag
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns