UBUNTU: [Packaging] retpoline -- elide %rip relative indirections

BugLink: http://bugs.launchpad.net/bugs/1758856

These are always safe because there is no way rip can be an unknown.
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>

debian/scripts/retpoline-extract-one

@@ -223,6 +223,9 @@ disassemble()
 		BEGIN				{ file="'"$object"'"; src="'"$src"'"; }
 		/Disassembly of section/        { segment=$4; sub(":", "", segment); }
 		/^[0-9a-f][0-9a-f]* <.*>:/      { tag=$0; sub(".*<", "", tag); sub(">.*", "", tag); }
+		$0 ~ /(call|jmp)q?  *\*0x[0-9a-f]*\(%rip\)/ {
+			next
+		}
 		$0 ~ /(call|jmp)q?  *\*.*%/ {
 			sub(":", "", $1);
 			if ('"$selector"') {