context: fix workingctx.fileflags() execute bit

mercurial/context.py

@@ -526,7 +526,7 b' class workingctx(changectx):'
         is_exec = util.execfunc(self._repo.root,
                                 lambda p: flag and 'x' in flag)
         try:
-            return (is_link(path) and 'l' or '') + (is_exec(path) and 'e' or '')
+            return (is_link(path) and 'l' or '') + (is_exec(path) and 'x' or '')
         except OSError:
             pass