gnucash master: Add mock sources and import-export test to dist

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/5fc2b951 (commit)
	from  https://github.com/Gnucash/gnucash/commit/def9a161 (commit)



commit 5fc2b9519c2368d60e2ce43ca970da25ae1f7029
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri May 29 17:20:53 2020 +0200

    Add mock sources and import-export test to dist



Summary of changes:
 gnucash/import-export/test/CMakeLists.txt | 10 ++++++----
 libgnucash/app-utils/CMakeLists.txt       |  7 ++++++-
 libgnucash/engine/CMakeLists.txt          |  7 ++++++-
 3 files changed, 18 insertions(+), 6 deletions(-)