With this new kernel variant, the kernel modules must be the one built
against the kernel we are want to use. The $KERNEL variable is matching
the KERNEL_PACKAGE_NAME of the variable in the kernel recipe.
BugzID: 69147
In order to be consistent with the OSTree images and to reuse all built
components, we must also make the minimal images (ie the ramdisk images)
reproducible.
If we don't do it, most of the components are rebuilt with a different
environment (mainly date related) and can therefor not be shared.
BugzID: 69091
In order to reduce the size of the minimal image, we want to exclude
python cached files.
NB: This only applies for files part of python3 package. Any python
libary can install its own pyc files.
BugzID: 67738
This flag made the initramfs to be bundle along with the
zImage which was then included in the fitImage that already
contains the initramfs. So the initramfs was present twice
and the fitImage was twice as big.