test: fix tests after V8 upgrade

Some error messages have changed and the --debugger flag does
not exist in V8 anymore.

Author: targos

test/message/vm_display_syntax_error.out

@@ -2,7 +2,7 @@ beginning
 
 test.vm:1
 var 5;
-^^^
+    ^
 SyntaxError: Unexpected number
     at Object.exports.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_display_syntax_error.js:*)

test/message/vm_dont_display_syntax_error.out

@@ -2,7 +2,7 @@ beginning
 middle
 test.vm:1
 var 5;
-^^^
+    ^
 SyntaxError: Unexpected number
     at Object.exports.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_dont_display_syntax_error.js:*)

test/parallel/test-repl.js

@@ -148,7 +148,7 @@ function error_test() {
     { client: client_unix, send: '(function() { "use strict"; return 0755; })()',
       expect: /^SyntaxError: Octal literals are not allowed in strict mode/ },
     { client: client_unix, send: '(function(a, a, b) { "use strict"; return a + b + c; })()',
-      expect: /^SyntaxError: Strict mode function may not have duplicate parameter names/ },
+      expect: /^SyntaxError: Duplicate parameter name not allowed in this context/ },
     { client: client_unix, send: '(function() { "use strict"; with (this) {} })()',
       expect: /^SyntaxError: Strict mode code may not include a with statement/ },
     { client: client_unix, send: '(function() { "use strict"; var x; delete x; })()',