Update generated efi boot image templates

r279533 increased the boot1 size from 64k to 128k but didn't regenerate the
fat templates, hence the change was never activated.

With recent and upcoming changes the efi boot1 binary is now > 64k.

To avoid fat corruption in the created boot images regenerate the
templates to activate the boot1 size increase.

MFC after: 2 weeks
X-MFC-With: r293268