- Update setuptools to 40.8.0
- Update pip to 19.0.3
- Refreshed patches
- Removed 4 patches (2 of them was included in 3.7.3 and other two are
included in this release)

Makefile python3:
- Move PKG_MAINTAINER above PKG_LICENSE

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

python3's lib2to3 would fail in silence if python3 and its packages are installed as compiled .pyc files. Root cause is, in Lib/lib2to3/refactor.py, the function get_all_fix_names only searches '.py' fix names.

Signed-off-by: Nj Hsiong <nj.hsiong@gmail.com>