Render building=construction differently

[apophenic-treehugger]

Related: #4825

Expected behavior

building=construction is rendered differently than already existing building=* (the same as highway=construction is rendered differently).

Actual behavior

building=construction is rendered the same as regular building=*

Screenshots with links illustrating the problem

See this building:

[imagico]

Thanks for the suggestion. The question of rendering specific types of buildings in a distinct fashion has been discussed in the past - see #738 and #2532.