The ornamental design for a resinbuilding, as shown and described.
FIG. 1 is a front perspective view of a resin building showing my new
design; FIG. 2 is a front view thereof; FIG. 3 is a right side view
thereof, the left side view being a mirror image; FIG. 4 is a back view
thereof; and, FIG. 5 is a top view thereof. The phantom line
representations in FIGS. 1-5 are exemplary and form no part of the
invention.