As this task is installing files into $D it needs to run inside pseudo so that
special permissions and owners are preserved.
(From OE-Core rev: 64f0a0bc408d8e32d5e795aeb9fffee0539f5e22)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>