Always update/install
Always update/install

Detection for when to write the bootloader and VBR entry isn't helpful
since detecting changes to extlinux for when a new VBR is needed is not
reasonably possible.

Also add extlinux install command.

ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager