gnucash-on-windows master: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/7fc6d296 (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/9fbc8052 (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/c48e09dc (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/8c36cd56 (commit)



commit 7fc6d2967d7aad59c0552f141ca01522eb068ef6
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Apr 15 13:30:26 2018 -0700

    Add branch maint to build_package options.

commit 9fbc80525f1fe16f6358fad276c6c4b9b0facf1b
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Apr 15 13:29:58 2018 -0700

    Clean builddir before building.
    
    Attempting to fix build failures because target library is busy being used by\nanother build command.

commit c48e09dce27b83b199911cf9ca3817ba1e2de48e
Author: John Ralls <jralls at ceridwen.us>
Date:   Sun Apr 15 13:28:26 2018 -0700

    Update gnucash-docs to 3.0.



Summary of changes:
 buildserver/build_package.ps1 | 2 +-
 gnucash.modules               | 4 ++--
 jhbuildrc.in                  | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)