Make CL_extractCSSMKeyNSS leak suppression more specific.

The bug is in Apple's CL_extractCSSMKeyNSS, specifically when it allocates some
memory directly at the top of the function. Move it out of the Chromium bugs
section and cite openradar.

BUG=481286

Review URL: https://codereview.chromium.org/1102673006

Cr-Commit-Position: refs/heads/master@{#326977}

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*
-}