chore(memcheck): hide another tcmalloc bug

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

src/memcheck.supp

@@ -116,6 +116,27 @@
    ...
 }
 
+{
+   # This entry suppresses the warning caused by a bug in tcmalloc
+   # It is the equivalent of TCMalloc_Bug2 for realloc
+   TCMalloc_Bug3
+   Memcheck:Param
+   msync(start)
+   obj:*/libpthread-2.*.*
+   obj:*/libunwind.so.*
+   ...
+   fun:_UL*_step
+   fun:*GetStackTrace*
+   fun:*PageHeap*GrowHeap*
+   fun:*PageHeap*New*
+   fun:*CentralFreeList*Populate*
+   fun:*CentralFreeList*FetchFromSpansSafe*
+   fun:*CentralFreeList*RemoveRange*
+   fun:*ThreadCache*FetchFromCentralCache*
+   fun:realloc
+   ...
+}
+
 {
    # This entry suppresses the warning caused by a bug in luajit 2.0
    LuaJIT_Bug1