Fix test_api.cpp's test_ObjectProtoToString failures

[zpao]

Calling an unimplemented API: void v8::FunctionTemplate::SetClassName(v8::Handle<v8::String>)
Calling an unimplemented API: v8::Local<v8::Function> v8::FunctionTemplate::GetFunction()

And then it segfaults.

[robarnold]

This is failing because we don't implement SetClassName. I have a hackish solution in mind.

[robarnold]

Hmm, nevermind. This is rather tricky to support.

[sdwilsh]

This no longer crashes, but does fail:

TEST-INFO | (c:/Code/v8monkey/js/src/v8api/test/test_api.cpp) | Running test_ObjectProtoToString.
TEST-UNEXPECTED-FAIL | c:/Code/v8monkey/js/src/v8api/test/test_api.cpp | Expected true, got false at line 3242
TEST-UNEXPECTED-FAIL | c:/Code/v8monkey/js/src/v8api/test/test_api.cpp | Expected true, got false at line 3246
TEST-UNEXPECTED-FAIL | c:/Code/v8monkey/js/src/v8api/test/test_api.cpp | Expected true, got false at line 3250
TEST-UNEXPECTED-FAIL | c:/Code/v8monkey/js/src/v8api/test/test_api.cpp | Expected true, got false at line 3255

The failure at line 3242 looks to be the case that the replaced toString function is not being called (probably because we don't set the prototype of our function properly?)

The failure at line 3246 is because we don't have the right name. We could work around the lack of a JS API here by doing a memcpy with a new object with the right name. Scary, but doable. The failure on line 3250 is likely related.

I do not understand what the failure at line 3255 is.