Add heapcheck suppression for NSS trust leak.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index db9bc559746ee3163747965056019c50c9c7604d..1d674e5f1208ad6e916cdbd30988ee950cda23fe 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -101,7 +101,25 @@
    fun:base::OpenTestNSSDB
    fun:net::CertDatabaseNSSTest::SetUp
 }
-
+{
+   bug_66941_a
+   Heapcheck:Leak
+   fun:PR_NewLock

[wtc, 2010/12/17 02:46:59]

The suppressions should all include CERT_ChangeCertTrust
in the call stacks.

In fact, I think it's fine to merge these into a single
suppression with this call stack:
  fun:CERT_ChangeCertTrust
  fun:net::TestRootCerts::*

[Ryan Sleevi, 2010/12/17 02:50:17]

wtc: Unfortunately, heapcheck wasn't picking up CERT_ChangeCertTrust as part of
the callstack. The suppressions went straight from Add/Clear into these three
functions. Otherwise, I would have just suppressed CERT_ChangeCertTrust without
the TestRootCerts, which is what I did for the Valgrind suppression.

+   fun:net::TestRootCerts::*
+}
+{
+   bug_66941_b
+   Heapcheck:Leak
+   fun:nss_ZAlloc
+   fun:net::TestRootCerts::*
+}
+{
+   bug_66941_c
+   Heapcheck:Leak
+   fun:PL_ArenaAllocate
+   fun:net::TestRootCerts::*
+}
+   
 #-----------------------------------------------------------------------
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing