valgrind.suppress: suppressed a false positive in the latest version of glibc on Amazon Linux.

valgrind.suppress

@@ -103,6 +103,13 @@ fun:main
    fun:ngx_alloc
    fun:ngx_event_process_init
 }
+{
+    <insert_a_suppression_name_here>
+    Memcheck:Param
+    sendmsg(mmsg[0].msg_hdr)
+    fun:sendmmsg
+    fun:__libc_res_nsend
+}
 {
    <insert_a_suppression_name_here>
    Memcheck:Param