Replace all kernel make export <all variables> instances with
export of specific variables. Depending on existing build
environment, exporting all as environment variables and
interaction with existing environment variable expansions
can lead to undefined behavior.
TODO: This change is restricted to kona flow to narrow impact.
All remaining export <all variables> need to be evaluated and
fixed similarly via subsequent changes.
Change-Id: I9114b88f7511d1b3f9b496b76fb6da9db97772b8
Signed-off-by: David Ng <dave@codeaurora.org>
4025a25a24