populate_sdk_base: fix directory creation as normal user

populate_sdk_base: fix directory creation as normal user

My previous patch removed the mkdir and added it at the end of the
"gaining SUDO rights" block in order to fix directory creation when
installing in a location without proper rights. Unfortunately this
messed up the directory creation as normal user as it will ask for
sudo right in order to create it...

Hopefully, this will fix both cases.

(From OE-Core rev: 86286287d0134ade73f6a282158dde86bf0159e8)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>