t8011: make hash size independent

Allow lines which start with either a 40- or 64-character hex object ID,
to allow for both SHA-1 and SHA-256.

Signed-off-by: brian m. carlson <[email protected]>
Reviewed-by: Eric Sunshine <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: bk2204

t/t8011-blame-split-file.sh

@@ -54,7 +54,7 @@ test_expect_success 'setup simulated porcelain' '
 	cat >read-porcelain.pl <<-\EOF
 	my $field = shift;
 	while (<>) {
-		if (/^[0-9a-f]{40} /) {
+		if (/^[0-9a-f]{40,} /) {
 			flush();
 			$hash = $&;
 		} elsif (/^$field (.*)/) {