packagedata: Fix to ensure variables expand correctly
If we set unsuffixed variables here there is a chance they could clobber
override versions of that variable, e.g. DESCRIPTION could clobber
DESCRIPTION_<pkgname>. We therefore don't clobber for the unsuffixed
variable versions by using the parsing flag to setVar.
This becomes a problem with the modifications to bitbake to
have continual expansion of the datastore, its about the one place this
turns out to be problematic.
The parameter to setVar works with current bitbake even though
we don't have the new API since it gets swallowed by the logging code.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
