The ornamental design for a building cladding panelendunit, as shown and described.
FIG. 1 is a top front left perspective view of a building cladding panel end unit showing my new design;
FIG. 2 is a front elevation view of the design shown in FIG. 1;
FIG. 3 is a rear elevation view of the design shown in FIG. 1;
FIG. 4 is a left end view of the design shown in FIG. 1;
FIG. 5 is a right end view of the design shown in FIG. 1;
FIG. 6 is a top plan view of the design shown in FIG. 1; and,
FIG. 7 is a bottom plan view of the design shown in FIG. 1.
The broken lines shown in the figures are included for the purpose of illustrating portions of the building cladding panel end unit and form no part of the claimed design.