FindQt5.cmake: look in the correct pkg-config file for QT_CONFIG_FLAGS
FindQt5.cmake: look in the correct pkg-config file for QT_CONFIG_FLAGS

Reviewed-by: Alexandr Akulich <ad71d6ef874ccc09e1a69fe0dd6443b72073e71a@gmail.com>

TelepathyIM/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt