bacnet-stack.inc: Fixed build issue

Fixed issue that was causing the build to fail the first time.
One of the multiple makefiles was attempting to run before the
static library was built, causing the failure.  Disabling parallel
build for the recipe fixes the issue.  Thanks to Michael Fainstein
for help with the issue.

Signed-off-by: Bryan Evenson <bevenson@melinkcorp.com>