foam.build.BuildApp: Fix delegate model usage
foam.build.BuildApp: Fix delegate model usage

jacksonic/foam,osric-the-knight/foam,jlhughes/foam,jlhughes/foam,jacksonic/foam,osric-the-knight/foam,mdittmer/foam,osric-the-knight/foam,osric-the-knight/foam,foam-framework/foam,jacksonic/foam,foam-framework/foam,mdittmer/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,jacksonic/foam,foam-framework/foam,mdittmer/foam,mdittmer/foam