gnucash maint: Fix typo in CMakeLists.txt

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/49771ee9 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ca87572a (commit)



commit 49771ee9f9b9e3c58b0677b7641f0e1e7ccc6b64
Author: iggyvolz <iggyvolz at gmail.com>
Date:   Tue Jul 23 20:04:22 2019 -0400

    Fix typo in CMakeLists.txt



Summary of changes:
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)