Make CL_extractCSSMKeyNSS leak suppression more specific.

tools/valgrind/memcheck/suppressions_mac.txt

Index: tools/valgrind/memcheck/suppressions_mac.txt
diff --git a/tools/valgrind/memcheck/suppressions_mac.txt b/tools/valgrind/memcheck/suppressions_mac.txt
index 8fb3d81dec762952a2b9d2b5caab5f4c553fc1fe..ac9c6874e66a58ab742ce697dea99f4cf9503420 100644
--- a/tools/valgrind/memcheck/suppressions_mac.txt
+++ b/tools/valgrind/memcheck/suppressions_mac.txt
@@ -94,6 +94,14 @@
    fun:__CFRunLoopRun
    ...
 }
+{
+   # See also http://openradar.appspot.com/20698633
+   bug_481286
+   Memcheck:Leak
+   ...
+   fun:_ZN8Security13PluginSession6mallocEm
+   fun:_Z20CL_extractCSSMKeyNSSRK33cssm_x509_subject_public_key_infoRN8Security9AllocatorEPK11DecodedCert
+}
 # Intentional leaks in AppKit, for an OS-level cache. Only appear on the first
 # run of each reboot.  See also issues 105525, 257276, 340847.
 {
@@ -280,21 +288,3 @@
    fun:_ZN2v88internal18StackFrameIteratorC1EPNS0_7IsolateE
    fun:_ZN2v88internal7Isolate11FindHandlerEv
 }
-{
-   bug_481286a
-   Memcheck:Leak
-   ...
-   fun:CSSM_CL_CertGetFirstCachedFieldValue
-   ...
-   fun:SecTrustEvaluate
-}
-{
-   bug_481286b
-   Memcheck:Leak
-   ...
-   fun:CSSM_CL_CertGetFirstCachedFieldValue
-   fun:_ZN8Security12KeychainCore11Certificate19copyFirstFieldValueERK9cssm_data
-   fun:_ZN8Security12KeychainCore11Certificate9publicKeyEv
-   fun:SecCertificateCopyPublicKey
-   fun:_ZN3net15X509Certificate16GetPublicKeyInfoEP23OpaqueSecCertificateRef*
-}