buildtools-extended-tarball: add nativesdk-libxcrypt-dev

virtual/crypt-native is assume provided in bitbake.conf, so
buildtools-extended-tarball shoud provide crypt since it doesn't
use the host's headers/libraries.

[YOCTO #13714]

(From OE-Core rev: da948b25)

(From OE-Core rev: bc42406d)

(From OE-Core rev: 6f6d7278)

Signed-off-by: Jeremy A. Puhlman <jpuhlman@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>