svn import: wrong file open mode

There are multiple | characters in Unicode. Don't use the wrong one ...

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>

git-svnimport.perl

diff --git a/git-svnimport.perl b/git-svnimport.perl
index ba9f818..2686f4a 100755
--- a/git-svnimport.perl
+++ b/git-svnimport.perl
@@ -440,7 +440,7 @@
 	}
 
 	if(@old) {
-		open my $F, "-│", "git-ls-files", "-z", @old or die $!;
+		open my $F, "-|", "git-ls-files", "-z", @old or die $!;
 		@old = ();
 		local $/ = '\0';
 		while(<$F>) {