gnucash maint: Set CONFIGURATIONS property on tests only for Xcode.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/4b8649f7 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ea552c7e (commit)



commit 4b8649f77bce81487317b8823aca520fac8a3816
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Apr 18 13:09:32 2020 -0700

    Set CONFIGURATIONS property on tests only for Xcode.
    
    Having it in the general case disabled a large number of tests.



Summary of changes:
 common/cmake_modules/GncAddTest.cmake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)