Move to toybox sort(1).

Test: treehugger
Change-Id: Ide649bbe9a73ab0e51d9bf4242d5c3c9172a85d6
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index 1b80ceb..f4ef034 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -115,7 +115,6 @@
 	"sha1sum":   Allowed,
 	"sha256sum": Allowed,
 	"sha512sum": Allowed,
-	"sort":      Allowed,
 	"tar":       Allowed,
 	"timeout":   Allowed,
 	"tr":        Allowed,
@@ -166,6 +165,7 @@
 	"rmdir":    Toybox,
 	"setsid":   Toybox,
 	"sleep":    Toybox,
+	"sort":     Toybox,
 	"stat":     Toybox,
 	"tail":     Toybox,
 	"tee":      Toybox,