oeqa/selftest/kernel.py: Add new file destined for kernel related tests
[YP#7202]: Test for linux-dummy
The new kernel.py file is intended for kernel related test cases.
The test for linux-dummy will ensure it is in good shape and can
be used as a kernel replacement at build time. To do this, the
test will first clean sstate for linux-dummy target, ensuring no
file is present in the stamps directory. After, core-image-minimal
is built, ensuring linux-dummy can be used as a kernel substitute.
Signed-off-by: Costin Constantin <costin.c.constantin@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
