meta: enable vertex attributes in the context of the newly created array object

meta: enable vertex attributes in the context of the newly created array object

Otherwise, the function would enable generic vertex attributes 0
and 1 of the array object it does not own. This was causing crashes
in Euro Truck Simulator 2, since the incorrectly enabled generic
attribute 0 in the foreign context got precedence before vertex
position attribute at later time, leading to NULL pointer dereference.

Cc: "9.2" <mesa-stable@lists.freedesktop.org>
Cc: "10.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Petr Sebor <petr@scssoft.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>