Suppresses the leaks for Bug 70062

This change just suppresses the leaks for Bug 70062. (Unfortunately, I'm not totally sure why these leaks happen on these bots because "net/socket/ssl_client_socket_nss.cc" has not been changed these days. Since the only change under 'net/socket' is r71739 <http://crrev.com/71739>, it emerged these leaks?)

TBR=thestig,timurrrr 
BUG=70062
TEST=make the "Linux Tests (valgrind)(3)" bot and the "Chromium OS UI (valgrind)(3)" bot green.
Review URL: http://codereview.chromium.org/6290007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71763 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1191,3 +1191,11 @@
    ...
    fun:*PrerenderResourceHandlerTest*
 }
+{
+   Bug_70062
+   Heapcheck:Leak
+   fun:PR_NewLock
+   fun:InitSessionCacheLocks
+   fun:initSessionCacheLocksLazily
+   fun:PR_CallOnce
+}

tools/valgrind/memcheck/suppressions.txt

@@ -3614,3 +3614,22 @@
    fun:_ZN17PluginChannelBase17OnMessageReceivedERKN3IPC7MessageE
    fun:_ZN13PluginChannel17OnMessageReceivedERKN3IPC7MessageE
 }
+{
+   Bug_70062
+   Memcheck:Leak
+   fun:calloc
+   fun:PR_Calloc
+   fun:PR_NewLock
+   ...
+   fun:InitSessionCacheLocks
+   fun:initSessionCacheLocksLazily
+   fun:PR_CallOnce
+   fun:ssl_InitSessionCacheLocks
+   fun:lock_cache
+   fun:ssl_LookupSID
+   fun:ssl2_BeginClientHandshake
+   fun:ssl_Do1stHandshake
+   fun:SSL_ForceHandshake
+   fun:_ZN3net18SSLClientSocketNSS11DoHandshakeEv
+   fun:_ZN3net18SSLClientSocketNSS15DoHandshakeLoopEi
+}