Are you running on Windows? It looks like it but I please confirm.
If you build the library for OpenGL ES 1 (KTX_OPENGL_ES1 = 1) you need to have an emulator installed on Windows. The pre-generated project files are set up to work with the PowerVR emulator from Imagination technologies. If you do not have that installed you will get such link errors when you build your application. If you want to use a different emulator, see gyp_include/config.gypi. After selecting your desired emulator there, you will have to regenerate the project files.