The ornamental design for a buildingcomponentextrusion, as shown and described.
FIG. 1 is a front perspective view of a building component extrusion showing our new design;
FIG. 2 is a back perspective view of the building component extrusion of FIG. 1; and,
FIG. 3 is an end view of the building component extrusion of FIG. 1.
The wave line shown at one of the ends of the building component extrusion indicates that any portion of the article beyond what is shown forms no part of the claimed design. The building component extrusion is shown with a symbolic break in its width shown in broken line. The appearance of any portion within the broken lines forms no part of the claimed design.