test: adjusted test files

Author: jorgsowa

ext/session/tests/bug80774.phpt

@@ -2,6 +2,8 @@
 Bug #80774 (session_name() problem with backslash)
 --EXTENSIONS--
 session
+--INI--
+session.use_strict_mode=0
 --FILE--
 <?php
 session_name("foo\\bar");

ext/session/tests/mod_files/gc_dirdepth_multi_subdir_count.phpt

@@ -7,6 +7,7 @@ session
 --INI--
 session.gc_probability=0
 session.gc_maxlifetime=10
+session.use_strict_mode=0
 --FILE--
 <?php
 $base = __DIR__ . '/gc_multi_subdir_test';

ext/session/tests/session_start_partitioned_headers.phpt

@@ -2,6 +2,8 @@
 session_start() with partitioned cookies - header test
 --EXTENSIONS--
 session
+--INI--
+session.use_strict_mode=0
 --FILE--
 <?php
 session_id('12345');