Fix tests - newer versions check Unicode

Author: smalyshev

ext/mbstring/tests/bug77370.phpt

@@ -6,8 +6,6 @@ Bug #77370 (Buffer overflow on mb regex functions - fetch_token)
 <?php
 var_dump(mb_split("   \xfd",""));
 ?>
---EXPECT--
-array(1) {
-  [0]=>
-  string(0) ""
-}
+--EXPECTF--
+Warning: mb_split(): mbregex compile err: invalid code point value in %sbug77370.php on line %d
+bool(false)

ext/mbstring/tests/bug77371.phpt

@@ -6,5 +6,6 @@ Bug #77371 (heap buffer overflow in mb regex functions - compile_string_node)
 <?php
 var_dump(mb_ereg("()0\xfc00000\xfc00000\xfc00000\xfc",""));
 ?>
---EXPECT--
-bool(false)
+--EXPECTF--
+Warning: mb_ereg(): mbregex compile err: invalid code point value in %sbug77371.php on line %d
+bool(false)

ext/mbstring/tests/bug77381.phpt

@@ -9,8 +9,15 @@ var_dump(mb_ereg("(?i)000000000000000000000\xf0",""));
 var_dump(mb_ereg("0000\\"."\xf5","0"));
 var_dump(mb_ereg("(?i)FFF00000000000000000\xfd",""));
 ?>
---EXPECT--
-int(1)
+--EXPECTF--
+Warning: mb_ereg(): mbregex compile err: invalid code point value in %sbug77381.php on line %d
 bool(false)
+
+Warning: mb_ereg(): mbregex compile err: invalid code point value in %sbug77381.php on line %d
 bool(false)
+
+Warning: mb_ereg(): mbregex compile err: invalid code point value in %sbug77381.php on line %d
+bool(false)
+
+Warning: mb_ereg(): mbregex compile err: invalid code point value in %sbug77381.php on line %d
 bool(false)