CGI scripts currently specify a mix of 'perl -w' and 'perl -wT'; fix that.

LayoutTests/http/tests/xmlhttprequest/methods.cgi

-#!/usr/bin/perl -w
+#!/usr/bin/perl -wT
 
 print "Content-type: text/plain\n"; 
 print "Content-Length: 0\n";
 my $cl = $ENV{'CONTENT_LENGTH'};
 my $ct = $ENV{'CONTENT_TYPE'};
 my $method = $ENV{'REQUEST_METHOD'};
 if (defined $cl) {
     print "REQLENGTH: $cl\n";
 }
 if (defined $ct) {
     print "REQTYPE: $ct\n";
 }
 print "REQMETHOD: $method\n";
 
 print "\n";