Add another suppression rule for Bug 51682.

This adds another suppression for Bug 51682 rule started since <http://build.chromium.org/p/chromium.memory/builders/Chromium%20Mac%20(valgrind)/builds/996/steps/memory%20test:%20net/logs/stdio>.

TBR=thestig,timurrrr
BUG=51682
TEST=make the "Chromium Mac (valgrind)" bot green.
Review URL: http://codereview.chromium.org/5893004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69399 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions_mac.txt

@@ -986,6 +986,23 @@
    fun:_ZL17cssm_DataGetFirst17cssm_dl_db_handlePK10cssm_queryPlP29cssm_db_record_attribute_dataP9cssm_dataPP21cssm_db_unique_record
    fun:CSSM_DL_DataGetFirst
 }
+{
+   bug_51682c
+   Memcheck:Leak
+   fun:realloc
+   fun:_ZN16DefaultAllocator7reallocEPvm
+   fun:_ZN8Security28CssmAllocatorMemoryFunctions12relayReallocEPvmS1_
+   fun:_ZNK8Security19CssmMemoryFunctions7reallocEPvm
+   fun:_ZN8Security28CssmMemoryFunctionsAllocator7reallocEPvm
+   fun:_ZN10Attachment13upcallReallocElPvj
+   fun:_ZN8Security13PluginSession7reallocEPvm
+   fun:_ZN17DecodedExtensions12addExtensionERK9cssm_databPvbPK22SecAsn1Template_structPS1_
+   fun:_ZN17DecodedExtensions13decodeFromNssEPP17NSS_CertExtension
+   fun:_ZN11DecodedCertC2ER18AppleX509CLSessionRKN8Security8CssmDataE
+   fun:_ZN18AppleX509CLSession22CertGetFirstFieldValueERKN8Security8CssmDataES3_RjRP9cssm_data
+   fun:_Z27cssm_CertGetFirstFieldValuelPK9cssm_dataS1_PlPjPPS_
+   fun:CSSM_CL_CertGetFirstFieldValue
+}
 {
    bug_60873
    Memcheck:Cond