scripts: prereqs: Add xxd to the prereq list
scripts: prereqs: Add xxd to the prereq list

Needed after https://sparrow-review.googlesource.com/c/sparrow/sw/vec-iree/+/15200

Change-Id: I19e0479657fcef59eb51318cb1ed8950cf86bb56
GitOrigin-RevId: 632bf722fdda52525cb96747d7b68f0c615241f1

AmbiML/sparrow-scripts-full,AmbiML/sparrow-scripts-full