gnucash-on-windows master: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/cbf63811 (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/cedc5ffb (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/b9cc6307 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/70f6645c (commit)



commit cbf63811274f5d8960533eb11261a35eb120b720
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Dec 27 14:31:57 2019 -0800

    Use a webkitgtk3 package built by the GnuCash team.
    
    To replace the obsolescent one no longer supported by MinGW-w64.

commit cedc5ffb7f3983102e71caed140fcbc9fe76472b
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Dec 27 14:29:39 2019 -0800

    Run pacman -Syyuu twice.
    
    If there's a core update the first one just does that.

commit b9cc630773cc85f99b287ff4fc8e673489cd66ff
Author: John Ralls <jralls at ceridwen.us>
Date:   Wed Dec 25 15:18:45 2019 -0800

    Update the msys installer to the current version.



Summary of changes:
 setup-mingw64.ps1 | 43 +++++++++++++++++++------------------------
 1 file changed, 19 insertions(+), 24 deletions(-)