tests: added new valgrind false positives in the latest nginx core.

Author: agentzh

valgrind.suppress

@@ -159,3 +159,13 @@
    fun:ngx_set_environment
    fun:ngx_single_process_cycle
 }
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:ngx_alloc
+   fun:ngx_set_environment
+   fun:ngx_worker_process_init
+   fun:ngx_worker_process_cycle
+}