Silence some system library leaks on OS X 10.7. These same leaks silenced on later OS X already. n-i-bz.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15311 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/darwin11.supp b/darwin11.supp
index 2008ace..f2fd6f5 100644
--- a/darwin11.supp
+++ b/darwin11.supp
@@ -65,6 +65,16 @@
    fun:pthread_mutex_lock
 }
 
+{
+   OSX107:10-Leak
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:?alloc
+   ...
+   fun:libSystem_initializer
+   ...
+}
+
 ################
 # More OSX 10.7.2 supps from startup of Firefox, for reports
 # that look like they are in the OSX system libraries