Add v8 patch to fix mac x64 build.

http://codereview.chromium.org/284012

deps/v8/src/x64/macro-assembler-x64.cc

@@ -699,7 +699,7 @@ void MacroAssembler::SmiTryAddConstant(Register dst,
                                        Smi* constant,
                                        Label* on_not_smi_result) {
   // Does not assume that src is a smi.
-  ASSERT_EQ(static_cast<intptr_t>(1), kSmiTagMask);
+  ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask));
   ASSERT_EQ(0, kSmiTag);
   ASSERT(!dst.is(kScratchRegister));
   ASSERT(!src.is(kScratchRegister));

src/file.cc

@@ -88,7 +88,7 @@ static Local<Object> BuildStatsObject(struct stat * s) {
   stats->Set(RDEV_SYMBOL, Integer::New(s->st_rdev));
 
   /* total size, in bytes */
-  stats->Set(SIZE_SYMBOL, Integer::New(s->st_size));
+  stats->Set(SIZE_SYMBOL, Integer::NewFromUnsigned(s->st_size));
 
   /* blocksize for filesystem I/O */
   stats->Set(BLKSIZE_SYMBOL, Integer::New(s->st_blksize));