Add memcheck suppressions.

tools/valgrind-webrtc/memcheck/suppressions.txt

Index: tools/valgrind-webrtc/memcheck/suppressions.txt
diff --git a/tools/valgrind-webrtc/memcheck/suppressions.txt b/tools/valgrind-webrtc/memcheck/suppressions.txt
index 3473db1201a9a2e37c94a9b2a34b07a0529bc725..bfb8ffcb88a3974f5405ce9c76250fc6c7fdb164 100644
--- a/tools/valgrind-webrtc/memcheck/suppressions.txt
+++ b/tools/valgrind-webrtc/memcheck/suppressions.txt
@@ -32,6 +32,14 @@
 # webrtc stuff
 
 {
+   bug_6784
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN3rtc10HttpServer16HandleConnectionEPNS_15StreamInterfaceE
+   fun:_ZN3rtc12_GLOBAL__N_122CreateClientConnectionERNS_10HttpServerERNS0_17HttpServerMonitorEb
+   fun:_ZN3rtc47HttpServer_SignalsCloseAfterForcedCloseAll_Test8TestBodyEv
+}
+{
    bug_6773_3
    Memcheck:Uninitialized
    fun:vfprintf