mesa: add LOCATION_COMPONENT support to GetProgramResourceiv

mesa: add LOCATION_COMPONENT support to GetProgramResourceiv

From Section 7.3.1.1 (Naming Active Resources) of the OpenGL 4.5 spec:

   "For the property LOCATION_COMPONENT, a single integer indicating the first
   component of the location assigned to an active input or output variable is
   written to params. For input and output variables with a component specified
   by a layout qualifier, the specified component is written. For all other
   input and output variables, the value zero is written."

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>