Avoid memory leaks in vfs tests

Signed-off-by: Slava Zanko <slavazanko@gmail.com>

lib/tests/vfs/current_dir.c

@@ -45,6 +45,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 static int

lib/tests/vfs/get_vfs_class.c

@@ -46,6 +46,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tests/vfs/vfs_path_string_convert.c

@@ -76,6 +76,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tests/vfs/vfs_prefix_to_class.c

@@ -86,6 +86,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tests/vfs/vfs_s_get_path_mangle.c

@@ -108,6 +108,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 

lib/tests/vfs/vfs_split.c

@@ -70,6 +70,7 @@ static void
 teardown (void)
 {
     vfs_shut ();
+    str_uninit_strings ();
 }
 
 /* --------------------------------------------------------------------------------------------- */