gnucash maint: Replace VERSION_GREATER_EQUAL with VERSION_GREATER OR VERSION_EQUAL.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/3815e17e (commit)
	from  https://github.com/Gnucash/gnucash/commit/79f4536a (commit)



commit 3815e17e9f2db7fbd7031b9118885d8567e60ad9
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Apr 22 12:12:03 2019 -0700

    Replace VERSION_GREATER_EQUAL with VERSION_GREATER OR VERSION_EQUAL.
    
    The former wasn't introduced until Cmake 3.7.



Summary of changes:
 common/cmake_modules/GncAddSchemeTargets.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)