Use find_packages to fill packages for build_exe

Otherwise cx_Freeze does not include the translation plugin as it is
dynamically loaded.

Closes #13208
(grafted from 0ab3cefbe003fb39da8b2f3dbb265743ed763f36)

--HG--
branch : 7.0

tryton/setup-freeze.py

@@ -124,14 +124,13 @@ version = version.strip()
 
 setup(name='tryton',
     version=version,
-    packages=find_packages(),
     options={
         'build_exe': {
             'no_compress': True,
             'include_files': include_files,
             'excludes': ['tkinter'],
             'silent': True,
-            'packages': ['gi'],
+            'packages': find_packages() + ['gi'],
             'include_msvcr': True,
             },
         'bdist_mac': {