valgrind: add suppression rules

tools/dev/valgrind/libgomp.suppr

@@ -1,6 +1,6 @@
 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #
-# Copyright (C) 2015-2017                                CNRS
+# Copyright (C) 2015-2018                                CNRS
 #
 # StarPU is free software; you can redistribute it and/or modify
 # it under the terms of the GNU Lesser General Public License as published by
@@ -51,3 +51,17 @@
    fun:_dl_init
    obj:/lib/x86_64-linux-gnu/ld-2.21.so
 }
+
+{
+   gomp4
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:gomp_malloc
+   fun:gomp_init_num_threads
+   fun:initialize_env
+   fun:call_init.part.0
+   fun:call_init
+   fun:_dl_init
+   obj:/lib/x86_64-linux-gnu/ld-2.27.so
+}