Update valgrind suppression file

There are some not suppressed references in ssh plugin test.
Also remove explicit object reference as it is not working
as expected in some distros.

Author: mbroz

tests/cryptsetup-valg-supps

@@ -33,7 +33,6 @@
    fun:_dl_map_new_object
    fun:dl_open_worker_begin
    ...
-   obj:*lib*/libc.so.*
 }
 {
    reachable_libc_dl_map_object
@@ -44,7 +43,6 @@
    fun:_dl_map_object
    fun:dl_open_worker_begin
    ...
-   obj:*lib*/libc.so.*
 }
 {
    reachable_libc_dl_new_object
@@ -55,7 +53,6 @@
    fun:_dl_new_object
    fun:_dl_map_object_from_fd
    ...
-   obj:*lib*/libc.so.*
 }
 {
    reachable_libc_dl_check_map_versions
@@ -66,5 +63,24 @@
    fun:_dl_check_map_versions
    fun:dl_open_worker_begin
    ...
-   obj:*lib*/libc.so.*
+}
+
+# libc plugins load
+{
+   reachable_libc_dl_load_cache_lookup
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_dl_load_cache_lookup
+   fun:_dl_map_new_object
+   ...
+}
+{
+   reachable_libc_dl_close_worker
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_dl_close_worker
+   fun:_dl_close
+   ...
 }