abuild: add datadir prefix to ldpath

So we actually scan those dirs

abuild.in

@@ -926,7 +926,7 @@ find_scanelf_paths() {
 	local controldir="$1" datadir="$2"
 	local paths="$datadir/lib:$datadir/usr/lib" i= rpath=
 	if [ -n "$ldpath" ]; then
-		paths="$paths:$ldpath"
+		paths="$paths:$(echo "$ldpath" | sed "s|\(^\|:\)|\1$datadir|g")"
 	fi
 	# search in all rpaths
 	for rpath in "$pkgbasedir"/.control.*/.rpath; do