manibuilder: Add list of tags used for the 1.0.x branch

Also add two new make targets `1.0.x` and `show-1.0.x`.

Change-Id: I2bc2e79729016a8f9908f316b051deeb73dc096f
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/30418
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed