feat(sptool): invoke the HOB list creation code

Add an SP setup function that invokes the HOB creation
utilities.

It introduces an argument "hob_path" to the shared dictionary of args
with the location of the generated binary containing the HOB list.

Signed-off-by: Kathleen Capella <kathleen.capella@arm.com>
Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I26a07027b6344c9d7ba732d022932736a62e2505
1 file changed