meta-tizen: crosswalk: add per architecture configuration

meta-tizen: crosswalk: add per architecture configuration

Configuration was defined on a per machine basis instead of per
architecture. Defining it for architectures remove redundancy between
configurations and does not restrict the machines to the ones listed in
the recipe.

Same thing is done for crosswalk-thirdparty.

Change-Id: Ic40bbec3a1849385bf098439e7371e9cc5a9cce8
(From meta-tizen rev: b4a55ae30baf49b467bdacf7cd45575d2d78386d)

Signed-off-by: Kévin THIERRY <kevin.thierry@open.eurogiciel.org>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>