gnucash master: Don't try to build gnucash-windows-locale.c on non-Windows OSes.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/8654cb86 (commit)
	from  https://github.com/Gnucash/gnucash/commit/14ed3222 (commit)



commit 8654cb86c88245aa605e71238d177b34959e0aa9
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat May 30 14:48:20 2020 -0700

    Don't try to build gnucash-windows-locale.c on non-Windows OSes.



Summary of changes:
 gnucash/CMakeLists.txt | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)