python should search for db.h in inc_dirs and not in a hardcoded path.
If db.h is found but HASHVERSION is not 2 we avoid a warning by not.
adding this module to missing variable.
[YOCTO #1937]
(From OE-Core rev: 79d0332f21769338a9f904308d8a808486e10fea)
Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>