Update auditParse to not prepend "b/" to bug IDs

Instead, the bug_map entries will now include the b/ prefix. This will
allow arbitrary URLs to be added as well to SELinux denial messages

Bug: 141014771
Test: Generated a denial, verified that the bug id in the dmesg logs
remains unchanged.

Change-Id: I4679117abdc2e13af81336b0b7fd8d69def80147

logd/LogAudit.cpp

@@ -160,7 +160,7 @@ void LogAudit::auditParse(const std::string& string, uid_t uid,
     }
     auto search = denial_to_bug.find(scontext + tcontext + tclass);
     if (search != denial_to_bug.end()) {
-        bug_num->assign(" b/" + search->second);
+        bug_num->assign(" " + search->second);
     } else {
         bug_num->assign("");
     }