[subset] don't use hb repacker when generating test files from fonttools.

test/subset/generate-expected-outputs.py

@@ -35,6 +35,7 @@ def generate_expected_output(input_file, unicodes, profile_flags, instance_flags
 			"--no-overlap-flag",
 			"--no-recalc-bounds",
 			"--no-recalc-timestamp",
+			"--no-harfbuzz-repacker", # disable harfbuzz repacker so we aren't comparing to ourself.
 			"--output=%s" % instance_path,
 			input_file]
 		args.extend(instance_flags)
@@ -45,6 +46,7 @@ def generate_expected_output(input_file, unicodes, profile_flags, instance_flags
 	args = ["fonttools", "subset", input_path]
 	args.extend(["--drop-tables+=DSIG",
 		     "--drop-tables-=sbix",
+		     "--no-harfbuzz-repacker", # disable harfbuzz repacker so we aren't comparing to ourself.
 		     "--unicodes=%s" % unicodes,
 		     "--output-file=%s" % fonttools_path])
 	args.extend(profile_flags)