Add CSP header for resources with an active policy

LayoutTests/http/tests/security/contentSecurityPolicy/resources/test-csp-header.pl

Index: LayoutTests/http/tests/security/contentSecurityPolicy/resources/test-csp-header.pl
diff --git a/LayoutTests/http/tests/security/contentSecurityPolicy/resources/test-csp-header.pl b/LayoutTests/http/tests/security/contentSecurityPolicy/resources/test-csp-header.pl
new file mode 100755
index 0000000000000000000000000000000000000000..55dc114e0f709d3dbea0835f6010171fb947af61
--- /dev/null
+++ b/LayoutTests/http/tests/security/contentSecurityPolicy/resources/test-csp-header.pl
@@ -0,0 +1,13 @@
+#!/usr/bin/perl
+
+if ($ENV{HTTP_CSP} eq "active") {
+    print "Status: 200\r\n";
+    print "Content-type: application/javascript\r\n";
+    print "\r\n";
+    print "script_loaded = true;\r\n\r\n"
+} else {
+    print "Status: 404\r\n";
+    print "Content-type: text/html\r\n";
+    print "\r\n";
+    print "CSP header not sent\r\n\r\n";
+}