Try to limit r00693 to 64 bit systems.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4844 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/tests/r00693.vtc

@@ -3,6 +3,8 @@
 
 test "check boundary condition on vrt_assemble_string()"
 
+feature 64bit
+
 server s1 {
 	rxreq
 	expect req.http.baz == "req.http.baz"

bin/varnishtest/vtc.c

@@ -482,6 +482,9 @@ cmd_feature(CMD_ARGS)
 		if (!strcmp(av[i], "SO_RCVTIMEO_WORKS"))
 			continue;
 #endif
+		if (sizeof(void*) == 8 && !strcmp(av[i], "64bit"))
+			continue;
+
 		vtc_log(vl, 1, "SKIPPING test, missing feature %s", av[i]);
 		vtc_stop = 1;
 		return;