Fix linking of liboctbstack: conectivity_abstraction requires coap
Fix linking of liboctbstack: conectivity_abstraction requires coap

The order in which static libraries are listed matters, so
connectivity_abstraction needs to appear before coap.

This also solves the problem on iOS that caused libcoap to be moved to
later.

Change-Id: I0d4913955e3745b69672ffff13dbc5d38a438ef6
Signed-off-by: Thiago Macieira <0ed1648d92ca0373297a182b1dba1b974ad10d88@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/920
Reviewed-by: Charlie Lenahan <5465da70c31cabbb269c3fd3f42e9ac10a2fdf2d@intel.com>
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Caiwen Zhang <48f0592afc0a377911a8c026109b5f1af886755a@intel.com>
Reviewed-by: Erich Keane <ec9f61fe526c14bb62c55d7c978f025ee6b3583d@intel.com>

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