gnucash maint: Fix test-gnc-timezone failure caused by latest zoneinfo release.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/ae66da96 (commit)
	from  https://github.com/Gnucash/gnucash/commit/89af5710 (commit)



commit ae66da96324e6b8545456c980caf81c93d368402
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Dec 26 13:45:28 2020 -0800

    Fix test-gnc-timezone failure caused by latest zoneinfo release.
    
    See the comment for details.



Summary of changes:
 libgnucash/engine/test/gtest-gnc-timezone.cpp | 7 +++++++
 1 file changed, 7 insertions(+)