gnucash-on-windows master: Update msys2 tarballs to latest.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/ecb4f165 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/14dd4700 (commit)



commit ecb4f165efa1f984920001f77e66cd23c077f6b4
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Dec 9 11:48:58 2018 -0800

    Update msys2 tarballs to latest.
    
    The 2016 ones don't work anymore.



Summary of changes:
 setup-mingw64.ps1 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)