Bug#631469: anjuta build failure on kbsd-*

[Petr Salinger]

Sufficient to finish build on GNU/kFreeBSD seems be this:

--- scripts/builder2schema.pl
+++ scripts/builder2schema.pl
@@ -23,8 +23,10 @@
  print "\t<schema id=\"$ARGV[1]\" path=\"/org/gnome/anjuta/\">\n";

  if ($#ARGV == 2) {
+  unless(-d $ARGV[2]){
         open FILE, "<", $ARGV[2] or die $!;
         while (<FILE>) { print "\t\t$_"; }
+  }
  }

  my $parser = new XML::Parser(Style => "Stream");