- workaround FTBFS against gstreamer-1.5 (#1234051)
    
    Workaround fact that included FindGStreamer.cmake is limited, only allows for single INCLUDE_DIR,
    this (webkit) one supports INCLUDE_DIRS and a whole lot more.
    A *proper* fix, imho, would be to not re-invent pkg-config wheel and just use
    something closer to a single call:
    PKG_CHECK_MODULES(TELEPATHY_FARSTREAM telepathy-farstream)
    for all cflags/libs.