abuild: fix object files detected as shared libs

dmd installs an object file that matches *.so.* so we need to check for
*.o explicitly.

abuild.in

@@ -1626,6 +1626,7 @@ scan_shared_objects() {
 
 		# we only want shared libs
 		case $soname in
+		*.o) continue;;
 		*.so|*.so.[0-9]*|*.c32);;
 		*) continue;;
 		esac