Fixes to get Dart VM compiling on Ubuntu 13.04, Debian Wheezy.

runtime/vm/object_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
@@ skipping 1595 matching lines @@
   EXPECT(elf2.IsSymbol());
   EXPECT_EQ(elf1.raw(), Symbols::New("Elf"));
   EXPECT_EQ(elf2.raw(), Symbols::New("Elf"));
 }
 
 
 TEST_CASE(SymbolUnicode) {
   uint16_t monkey_utf16[] = { 0xd83d, 0xdc35 };  // Unicode Monkey Face.
   String& monkey = String::Handle(Symbols::FromUTF16(monkey_utf16, 2));
   EXPECT(monkey.IsSymbol());
-  const char monkey_utf8[] = {0xf0, 0x9f, 0x90, 0xb5, 0};
+  const char monkey_utf8[] = {'\xf0', '\x9f', '\x90', '\xb5', 0};
   EXPECT_EQ(monkey.raw(), Symbols::New(monkey_utf8));
 
   int32_t kMonkeyFace = 0x1f435;
   String& monkey2 = String::Handle(Symbols::FromCharCode(kMonkeyFace));
   EXPECT_EQ(monkey.raw(), monkey2.raw());
 
   // Unicode cat face with tears of joy.
   int32_t kCatFaceWithTearsOfJoy = 0x1f639;
   String& cat = String::Handle(Symbols::FromCharCode(kCatFaceWithTearsOfJoy));
 
@@ skipping 1736 matching lines @@
   const Function& test7 = Function::Handle(GetFunction(class_a, "test7"));
   EXPECT_EQ(test1.SourceFingerprint(), test2.SourceFingerprint());
   EXPECT_NE(test1.SourceFingerprint(), test3.SourceFingerprint());
   EXPECT_NE(test3.SourceFingerprint(), test4.SourceFingerprint());
   EXPECT_NE(test4.SourceFingerprint(), test5.SourceFingerprint());
   EXPECT_NE(test5.SourceFingerprint(), test6.SourceFingerprint());
   EXPECT_EQ(test6.SourceFingerprint(), test7.SourceFingerprint());
 }
 
 }  // namespace dart