Add reliability supression for crash in net::NetworkDelegate.

chrome/test/data/reliability/known_crashes.txt

Index: chrome/test/data/reliability/known_crashes.txt
===================================================================
--- chrome/test/data/reliability/known_crashes.txt	(revision 99494)
+++ chrome/test/data/reliability/known_crashes.txt	(working copy)
@@ -207,3 +207,7 @@
 
 # 95069
 PREFIX: `anonymous namespace'::invalidparameter____purecall___memcpy_s___std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign___gurl::gurl___`anonymous namespace'::do_malloc___malloc___scoped_refptr<resourcehandler>::operator=___resourcedispatcherhost::beginrequest___resourcehostmsg_requestresource::dispatch<resourcedispatcherhost,resourcedispatcherhost,int,resourcehostmsg_request const &>
+
+# 95289
+PREFIX: net::networkdelegate::notifycompleted___net::urlrequest::docancel___net::urlrequest::~urlrequest___stldeletevalues<std::map<globalrequestid,net::urlrequest *,std::less<globalrequestid>,std::allocator<std::pair<globalrequestid const ,net::urlrequest *> > > >___resourcedispatcherhost::onshutdown
+