tools/dev/valgrind/libc.suppr: add suppression for openmp testcases

tools/dev/valgrind/libc.suppr

@@ -1,6 +1,6 @@
 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #
-# Copyright (C) 2014,2016-2019                           CNRS
+# Copyright (C) 2014,2016-2020                           CNRS
 # Copyright (C) 2014-2016,2019                           Université de Bordeaux
 #
 # StarPU is free software; you can redistribute it and/or modify
@@ -259,3 +259,21 @@
    Memcheck:Cond
    obj:/usr/lib/x86_64-linux-gnu/libltdl.so.7.3.1
 }
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:_dl_close_worker
+   fun:_dl_close_worker
+   fun:_dl_close
+   fun:_dl_catch_exception
+   fun:_dl_catch_error
+   fun:dlerror_run
+   fun:free_mem
+   fun:__libc_freeres
+   fun:_vgnU_freeres
+   fun:__run_exit_handlers
+   fun:exit
+   fun:(below main)
+}