Fix this test-case to not rely on being able to compile /dev/null

now that this is no longer possible.



git-svn-id: http://www.varnish-cache.org/svn/trunk@3389 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/tests/v00016.vtc

@@ -2,16 +2,20 @@
 
 test "Various VCL compiler coverage tests"
 
+shell "true > /tmp/_varnishtest_empty_file"
+
 varnish v1 -vcl {
 	backend b { .host = "127.0.0.1"; }
-	include "/dev/null" ;
+	include "/tmp/_varnishtest_empty_file" ;
 }
 
 varnish v1 -badvcl {
 	backend b { .host = "127.0.0.1"; }
-	include "/dev/null" |
+	include "/tmp/_varnishtest_empty_file" |
 }
 
+shell "rm -f /tmp/_varnishtest_empty_file"
+
 varnish v1 -badvcl {
 	backend b { .host = "127.0.0.1"; }
 	include <<