aboot: Enable kernel parsing of Secondary GPT in recovery

If booting in recovery pass 'gpt' in kernel command line which
enables kernel to parse secondary GPT table in case of corrupted
primary one.
This is needed if updating boot loaders in recovery fails and we are
forced to boot from backup copies of boot partitions pointed to by
secondary GPT.

Change-Id: I0d0b1e015c205c0f91292c98f148488db13b8df3
1 file changed