python-native: add dependency for gdbm and db native packages

python-native: add dependency for gdbm and db native packages

These two packages are required to ensure the manifest files contain
all of the generated packages.  Without this, the db and gdbm packages
will not contain the .so files as they are skipped during the compilation steps

(From OE-Core rev: 912c06615269f42230db2d93d70db2b340ed270a)

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>