This new method extract the content of RPM file to a tmpdir,
without actually installing the package.
[YOCTO #9569]
(From OE-Core rev: 5f5c2a0fac5ad2baca162902410064375e8c610c)
Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>