gnucash-on-windows master: Build Guile without thread support.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/5e67ac41 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/1a58fa9b (commit)



commit 5e67ac411a48cb31b06d76615b2fd87a1c99c069
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat May 16 17:28:26 2020 -0700

    Build Guile without thread support.
    
    An attempt to prevent garbage collection deadlocks.



Summary of changes:
 gnucash.modules                             |  6 ++---
 patches/0001-MinGW-doesn-t-do-signals.patch | 34 +++++++++++++++++++++++++++++
 patches/0003-AC_DEFINE-REPLACE_MKTIME.patch | 11 ----------
 3 files changed, 37 insertions(+), 14 deletions(-)
 create mode 100644 patches/0001-MinGW-doesn-t-do-signals.patch