Verify Mac build works about node-embed

[luminosuslight]

Fixed libnode filename.
Still doesn't build atm.

[ 33%] Linking CXX executable ../../node-embed.app/Contents/MacOS/node-embed
Undefined symbols for architecture x86_64:
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(char const*, unsigned long)", referenced from:
      RssFeed::cppLog(v8::FunctionCallbackInfo<v8::Value> const&) in RssFeed.cpp.o

[luminosuslight]

The build works with a clean CMake environment. In Qt Creator one has to create a new Kit for this, that doesn't modify CMake variables except for CMAKE_PREFIX_PATH.

The next problem is that the dylib is not found.
A workaround is:

cp libnode.59.dylib /usr/local/lib/libnode.59.dylib

[luminosuslight]

Because the build works and only a packaging / requirements issue remains, this is considered closed.