buildtools-tarball: include nativesdk-ca-certificates

buildtools-tarball: include nativesdk-ca-certificates

nativesdk-ca-certificates is needed in order to support oe/yocto builds with
buildtools-tarball on old hosts, as we provide libcurl, and that needs to be
able to find the certs, and there's no standard path or bundle path, so we
can't rely on the host.

(From OE-Core rev: 057954bcc4baf9194968169591537cd7584f8bcb)

Signed-off-by: Fahad Usman <fahad.usman@gmail.com>
Signed-off-by: Christopher Larson <kergoth@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>