Allow to specify an optional <bootloadersettings> element
inside of the <bootloader> section. The information is used to
specify custom arguments for the tools called in a bootloader
setup procedure, e.g shim-install, grub-install or grub-mkconfig.
kiwi does not judge on the given parameters and if the provided
data is effectively used depends on the individual bootloader
implementation. In this commit the data will be effectively
handled if bootloader="grub2" is configured. More precisely
the custom additions to support SUSE's TPM model with grub2
can be configured as follows:
<bootloadersettings>
<shimoption name="--suse-enable-tpm"/>
<installoption name="--suse-enable-tpm"/>
<configoption name="--set-trusted-boot"/>
</bootloadersettings>
This Fixes#2224
ef35bef97b