Switch to toybox stat(1).

Test: treehugger
Change-Id: Iebda993046935c17b1e37129a530f6eab9166018
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index 4dc62b8..e306929 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -119,7 +119,6 @@
 	"sha256sum": Allowed,
 	"sha512sum": Allowed,
 	"sort":      Allowed,
-	"stat":      Allowed,
 	"tar":       Allowed,
 	"timeout":   Allowed,
 	"tr":        Allowed,
@@ -168,6 +167,7 @@
 	"rmdir":    Toybox,
 	"setsid":   Toybox,
 	"sleep":    Toybox,
+	"stat":     Toybox,
 	"tail":     Toybox,
 	"tee":      Toybox,
 	"touch":    Toybox,