Documentation: Add HOWTO Spanish translation into rst based build system

Add Spanish translation of HOWTO document into rst based documentation
build system.

Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com>
Link: https://lore.kernel.org/r/20221024145521.69465-3-carlos.bilbao@amd.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>