[GRUB] Add sysdata and bootscript support to GRUB

Add:

• Seco's GRUB repository with custom modules (such as sysdata, seco_module, lua).
• support to bootscript following U-boot implementation for ARM architecture.
• support to sysdata

Remove:

• GRUB patches, not needed.
• the recipe grub-bootconf-seco as the grub.cfg is now handled by bootscript recipe.

Modify:

• installation script to be compatible with the bootscript
• partition order so that the first partition is "boot" instead of "swap" as the bootscript looks for the environment file in the first partition.

EDIT: GRUB's recipes have been moved to meta-seco-bsp.

JIRA Reference: [CLEAOS-673]

Signed-off-by: Nicola Sparnacci nicola.sparnacci@seco.com