gnucash maint: Fix localedir relocation.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/2d565215 (commit)
	from  https://github.com/Gnucash/gnucash/commit/59a6ebc3 (commit)



commit 2d565215cd3306f477ef51b12cfae878438dde9b
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Sep 18 16:08:48 2018 -0700

    Fix localedir relocation.
    
    Since LOCALEDIR is now always absolute we need to see if there's a
    prefix and if LOCALEDIR is a subdir of PREFIX instead.



Summary of changes:
 libgnucash/core-utils/gnc-path.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)