python3: Update to 3.6.1 (#2587)

* python3: Update to 3.6.1

The patches starting with 16 are new to fix the build.
Some no longer relevant patches were dropped, the rest is just refreshed.

* Bump pkgrel of all packages containing Python 3 bytecode/extensions.

The package list was generated using:
    pkgfile.exe -R mingw64 -r "cpython.*\\.(py[cod]|dll)"

* lensfun: Add cmake to makedepends

* numpy: Don't hardcode the Python version

* blender: rebuild for new Python

* boost: Don't hardcode Python versions; rebuild

* pillow: Don't hardcode Python version; rebuild

* python-dateutil: Don't hardcode Python versions

* sip: Don't hardcode Python versions

* pyqt4: Don't hardcode Python versions; rebuild

* pyqt5: Don't hardcode Python versions; rebuild

* opencv: Update Python3 version in patch

mingw-w64-python-ipython_genutils/PKGBUILD

@@ -7,7 +7,7 @@ pkgname=(
   "${MINGW_PACKAGE_PREFIX}-python2-${_realname}"
 )
 pkgver=0.1.0
-pkgrel=1
+pkgrel=2
 pkgdesc="IPython vestigial utilities (mingw-w64)"
 url="https://github.com/ipython/ipython_genutils"
 arch=('any')