fix MSVC build error

[ysc3839]

编译命令:

cd build
cmake -DINCLUDE_OPENCV=ON -DENABLE_MNN=OFF -DENABLE_NCNN=OFF -DENABLE_TNN=OFF ..
cmake --build . --config MinSizeRel

使用 VS2022 (v143) 工具链测试成功编译。

主要有下列三种错误:

1. deeplabv3_resnet101.cpp(14,35): error C2039: 'utils': is not a member of 'lite'
   解决方案: #include "lite/utils.h"
2. faceboxes.cpp(93,72): error C4576: a parenthesized type followed by an initializer list is a non-standard explicit type conversion syntax
   解决方案: anchors.push_back((FaceBoxesAnchor) {cx, cy, s_kx, s_ky}); -> anchors.push_back(FaceBoxesAnchor{cx, cy, s_kx, s_ky});
3. types.h(263,12): error C2039: 'Rect': is not a member of 'lite::cv'
   解决方案: cv::Rect -> ::cv::Rect

[DefTruth]

merged, many thanks for your contribution !