gnucash-docs maint: it's builddir, not buildir

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/0a7a95c3 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/f8e2df0d (commit)



commit 0a7a95c3880defcfa90859f18f5e8074bccb8134
Author: Derek Atkins <derek at ihtfp.com>
Date:   Mon Jan 23 10:08:41 2017 -0500

    it's builddir, not buildir



Summary of changes:
 guide/it/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)