D7823: Add FindGLIB2.cmake and FindPulseAudio.cmake to ECM

[Jonathan Marten]

marten added a subscriber: heikobecker.

REPOSITORY
  R240 Extra CMake Modules

REVISION DETAIL
  https://phabricator.kde.org/D7823

To: marten, #frameworks, #build_system
Cc: heikobecker