btfdiff: Use --sort for pretty printing from both BTF and DWARF

$ btfdiff vmlinux
  $

As expected, no change, both sort to the same output, now lets add
--jobs to the DWARF case.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

btfdiff

@@ -25,11 +25,13 @@ pahole_bin=${PAHOLE-"pahole"}
 
 ${pahole_bin} -F dwarf \
 	      --flat_arrays \
+	      --sort \
 	      --suppress_aligned_attribute \
 	      --suppress_force_paddings \
 	      --suppress_packed \
 	      --show_private_classes $dwarf_input > $dwarf_output
 ${pahole_bin} -F btf \
+	      --sort \
 	      --suppress_packed \
 	      $btf_input > $btf_output