sysvinit: unmount the psplash lazyily

There is an race condition where psplash is not quite exited before the unmount occurs
causing a umount: /mnt/.psplash: target is busy message to appear, it's ok to lazyily
unmount and not get this message

[YOCTO #5244]

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
python: Fix ptest not working problems

The run-ptest contained in python uses a Makefile. The path of the
Makefile is changed to ${libdir}/python/ptest in do_install_ptest.
However, the directory is wrong when the project is configured with
"--enable-multilib=lib32"

In addition, do_install_ptest is defined before "inherit ptest", so
it is overriden by the one in ptest.bbclass. do_install_ptest is
moved down.

Signed-off-by: Zhangle Yang <zhangle.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>