Replace := by = in nls.mk files

Peter Eisentraut <peter_e@gmx.net>

Commit: 1b11e239cac545b86886a30fa15ae1f7c2d6e385
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2011-06-26T17:08:38Z
Releases: 9.2.0
Replace := by = in nls.mk files

It currently doesn't make a difference, but it's inconsistent with
most other usage, and it might interfere with a future patch, so I'll
change it all in a separate commit.

Also, replace tabs with spaces for alignment.

Files