RetinaFace Makefile

Hello
I've been working on the face detection model and followed instructions on the README. I want to use my camera to carry out real time detection, so I implemented the basic openCV to capture and process frames in the test.py file. I am able to detect faces however the test.py only works when I set the gpuid = -1 (cpu), when I change it to gpuid = 0 there are no errors but the script does not execute. After researching I found out that not all the files have been built properly in the cython folder; the gpu_nms.pyx file is causing errors while building. So I figured maybe this is why I'm able to bind the model in test.py to the GPU.

I'm using Windows as my OS, Python 3.9, CUDA 10.2 and I've installed mxnet-cu10.2 version 1.7.0.

This is the message I get when I run the Makefile
```
PS C:\Users\OMEN 45L\Desktop\gitlab\detectionservice\retinaface> make
cd rcnn/cython/ && python setup.py build_ext --inplace && del -rf build
CUDA is found
cl : Command line warning D9024 : unrecognized source file type 'gcc', object file assumed
cl : Command line warning D9027 : source file 'gcc' ignored
cl : Command line warning D9024 : unrecognized source file type 'nvcc', object file assumed
cl : Command line warning D9027 : source file 'nvcc' ignored
gpu_nms.cpp
c:\users\omen 45l\appdata\local\programs\python\python39\lib\site-packages\numpy\core\include\numpy\npy_1_7_deprecated_api.h(14) : Warning Msg: Using deprecated NumPy API, disable it with #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
gpu_nms.cpp(4598): warning C4244: '=': conversion from 'npy_intp' to 'int', possible loss of data
gpu_nms.cpp(4608): warning C4244: '=': conversion from 'npy_intp' to 'int', possible loss of data
gpu_nms.cpp(4793): error C2664: 'void _nms(int *,int *,const float *,int,int,float,int)': cannot convert argument 1 from '__pyx_t_5numpy_int32_t *' to 'int *'
gpu_nms.cpp(4793): note: Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.16.27023\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
make: *** [Makefile:2: all] Error 1
```