Fix gen_notice init to support arch and dist.

Incorrect init function was called so Stem property was not handled
correctly and the dist properties were treated as unknown.

Test: m droid dist

Change-Id: I5eb8771afb4fda332df08cf1560df5c17d1316cc
Merged-in: I5eb8771afb4fda332df08cf1560df5c17d1316cc