opkg: create opkg.lock in /run instead of /var/run
This avoids a "Could not unlink" warning when extracting a /var/run
symbolic link pointing to /run from the base-files package as it is
unable to unlink the /var/run directory when it contains opkg.lock.
This also fixes an issue where /var/run is created as a directory
instead of a symbolic link to /run.
Signed-off-by: Jonathan Liu <net147@gmail.com> Acked-by: Anders Darander <anders@chargestorm.se> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
