abuild: prepare_metafiles: use new /bin/sh virtual instead of hardcoded busybox dependency

abuild.in

@@ -894,13 +894,13 @@ prepare_metafiles() {
 	EOF
 	local i deps
 	deps="$depends"
-	if [ "$pkgname" != "busybox" ] && ! depends_has busybox; then
+	if [ "$pkgname" != "busybox" ] && ! depends_has busybox && ! depends_has /bin/sh; then
 		for i in $install $triggers; do
 			local s=${i%=*}
 			[ "$name" != "${s%.*}" ] && continue
 			if head -n 1 "$startdir/$s" | grep '^#!/bin/sh' >/dev/null ; then
-				msg "Script found. busybox added as a dependency for $pkg"
-				deps="$deps busybox"
+				msg "Script found. /bin/sh added as a dependency for $pkg"
+				deps="$deps /bin/sh"
 				break
 			fi
 		done