abuild: force single space be separator when parsing scanelf output

otherwise will awk not detect empty fields

abuild.in

@@ -373,7 +373,7 @@ prepare_tracedeps() {
 	local dir=${subpkgdir:-$pkgdir}
 	options_has "!tracedeps" && return 0
 	find -name '*.so' -o -name '*.so.[0-9]*' | sed 's:.*/::' >"$dir"/.provides-so
-	scanelf -Rn "$dir" | awk '$1 == "ET_DYN" || $1 == "ET_EXEC" {print $2}'  \
+	scanelf -Rn "$dir" | awk -F "\ " '$1 == "ET_DYN" || $1 == "ET_EXEC" {print $2}'  \
 		| sed 's:,:\n:g' | sort | uniq \
 	| while read i; do
 		# only add files that are not self provided