regions: Change Agrentina keyboard's mechanical layout to ISO

The Agrentina keyboard's keyboard mechanical should use ISO
instead of ANSI.

BUG=b:62075923
TEST=./regions_unittest.py

Original-Change-Id: I05eb15858787ccb4807f99dd18c22ffd6fa0ec3b
Reviewed-on: https://chromium-review.googlesource.com/525254
Commit-Ready: Paris Yeh <pyeh@chromium.org>
Tested-by: Paris Yeh <pyeh@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Shu Chen <shuchen@chromium.org>
Reviewed-by: Paris Yeh <pyeh@chromium.org>

Conflicts:
	regions/regions.py

Change-Id: I8e3d2de5c004ae4153e453876606c7927e526c20
Reviewed-on: https://chromium-review.googlesource.com/831382
Tested-by: Anfernee Chen <anfernee_chen@wistron.corp-partner.google.com>
Reviewed-by: Marco Chen <marcochen@chromium.org>
Commit-Queue: Anfernee Chen <anfernee_chen@wistron.corp-partner.google.com>
diff --git a/regions/regions.py b/regions/regions.py
index a82feed..f50a55a 100755
--- a/regions/regions.py
+++ b/regions/regions.py
@@ -467,7 +467,7 @@
         ['tr', 'en-GB'], _KML.ISO, 'Turkey', None, 224),
     Region(
         'ar', 'xkb:latam::spa', 'America/Argentina/Buenos_Aires',
-        ['es-AR'], _KML.ANSI, 'Argentina', None, 251)]
+        ['es-AR'], _KML.ISO, 'Argentina', None, 251)]
 
 """A list of :py:class:`regions.Region` objects for
 all **confirmed** regions.  A confirmed region is a region whose