The ornamental design for building exterior, as shown and described.
FIG. 1 is a first perspective view of a building exterior embodying a first embodiment of the design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a first perspective view of a building exterior of a second embodiment of the design;
FIG. 9 is a second perspective view thereof;
FIG. 10 is a front view thereof;
FIG. 11 is a rear view thereof;
FIG. 12 is a right side view thereof;
FIG. 13 is a left side view thereof; and,
FIG. 14 is a top view thereof.
FIGS. 1–14 show features of a building exterior in phantom lines. These features are shown for environmental purposes, and do not form any part of the claimed design. Further, the phantom lines immediately adjacent the solid-line portions of the design form the boundary of the design, with the phantom lines forming no part of the claimed design.