gnucash-on-windows master: Upgrade Xmlsec to 1.2.28.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/fbd83a59 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/e8c752fa (commit)



commit fbd83a592083f5599c09b3827c6e70cb1f815c05
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Apr 30 20:26:22 2019 -0700

    Upgrade Xmlsec to 1.2.28.
    
    Required to work with latest Mingw64 OpenSSL package.



Summary of changes:
 gnucash.modules | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)