Adding the option to build syslinux into initramfs

[phoefler]

This PR also builds syslinux into initramfs if INITRAMFS_PARTED_SUPPORT variable is set to yes (in project options file)

[stefansaraev]

huh but why?

[phoefler]

the same reason @sraue added parted and mkfs.ext4 as an option: we use a project specific initramfs.conf file which listens for a kernel command line parameter and can automatically copy KERNEL & SYSTEM to ram, repartition the harddisk to two partitions, format the two partitions, copies KERNEL & SYSTEM back to part1 and install syslinux bootloader to the harddisk ;-)
That way we can change thousand of boxes from onepartition OS to OE without a problem ;-)

[stefansaraev]

huh. I dont really understand the reasoning. this (and repartitioning) should be done via some systemd service like our fs-resize.service. init should be as minimal as possible. @sraue ?

and you miss gptmbr.bin and syslinux. not everything everywhere is ext4. EDIT: doesnt really matter, as this seems to be for some very specific project of yours.

but well. ok...

[phoefler]

additional features (filesystems, loaders) are welcome if someone else uses this feature ;-)

[chewitt]

@phoefler - I'm doing cleanup/review of old PR's and last update on this was ~13 months ago. Is this still required?

[phoefler]

@chewitt Yes, we would still appreciate this change in master

[chewitt]

@sraue - please review and comment