bitbake: cooker/utils: Drop custom 'interactive' variables list and store environment in BB_ORIGENV instead

Maintining hardcoded lists of user environmental variables is hacky,
replace these with the savedenv datastore. Allow access to that
through the BB_ORIGENV variable.

(Bitbake rev: 0a99563a4ea270594fd9a61da46f9387fb79dc66)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -185,6 +185,7 @@ class BBCooker:
 
         filtered_keys = bb.utils.approved_variables()
         bb.data.inheritFromOS(self.configuration.data, self.savedenv, filtered_keys)
+        self.configuration.data.setVar("BB_ORIGENV", self.savedenv)
 
     def enableDataTracking(self):
         self.configuration.data.enableTracking()