Improve parallelization of CSP and XSSAuditor reporting tests.

LayoutTests/http/tests/security/xssAuditor/resources/echo-intertag.pl

 #!/usr/bin/perl -wT
 use strict;
 use CGI;
 
 my $cgi = new CGI;
 
 # Passing semicolons through the url to this script is problematic. The raw
 # form truncates the input and the %-encoded form isn't being decoded. Hence
 # this set of hard-coded headers.
 if ($cgi->param('disable-protection')) {
     print "X-XSS-Protection: 0\n";
 }
 if ($cgi->param('enable-full-block')) {
     print "X-XSS-Protection: 1; mode=block\n";
 }
 if ($cgi->param('enable-report')) {
-    print "X-XSS-Protection: 1; report=/security/contentSecurityPolicy/resources/save-report.php\n";
+    print "X-XSS-Protection: 1; report=/security/contentSecurityPolicy/resources/save-report.php?test=" . $cgi->param('test') . "\n";
 }
 if ($cgi->param('enable-full-block-report')) {
-    print "X-XSS-Protection: 1; mode=block; report=/security/contentSecurityPolicy/resources/save-report.php\n";
+    print "X-XSS-Protection: 1; mode=block; report=/security/contentSecurityPolicy/resources/save-report.php?test=" . $cgi->param('test') . "\n";
 }
 
 if ($cgi->param('valid-header')) {
     if ($cgi->param('valid-header') == 1) {
         print "X-XSS-Protection:   1  ;MoDe =  bLocK   \n";
     }
     if ($cgi->param('valid-header') == 2) {
         print "X-XSS-Protection: 1; \n";
     }
     if ($cgi->param('valid-header') == 3) {
@@ skipping 97 matching lines @@
     print "<p>If you see this message then the test FAILED.</p>\n";
 }
 if ($cgi->param('alert-cookie')) {
     print "<script>if (/xssAuditorTestCookie/.test(document.cookie)) { alert('FAIL: ' + document.cookie); document.cookie = 'xssAuditorTestCookie=remove; max-age=-1'; } else alert('PASS');</script>\n";
 }
 if ($cgi->param('echo-report')) {
     print "<script src=/security/contentSecurityPolicy/resources/go-to-echo-report.js></script>\n";
 }
 print "</body>\n";
 print "</html>\n";