recipetool: create: use ${BP} for subdir for binary packages
If we use ${BP} for the subdirectory, the default value of S will work
rather than having to have an ugly value derived from the package
file name in both places. This does mean that we have to assume the
default though (we can't just let the normal logic work because the
value of BP is the default until later on, so the replacement doesn't
work).
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
