python3: bump to version 3.6.4

Re-worked patch `003-do-not-run-distutils-tests.patch`
to reduce patch-size.

Removed `011-fix-ncursesw-definition-colisions.patch`
it is fixed upstream.

Refreshed with `make package/python3/refresh`

Resetting PKG_RELEASE to 1.
This variable was never used for pip3 & setuptools, since
VERSION is specified in the package definitions.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/python3/patches/006-remove-multi-arch-and-local-paths.patch

@@ -1,6 +1,6 @@
 --- a/setup.py
 +++ b/setup.py
-@@ -487,16 +487,9 @@ class PyBuildExt(build_ext):
+@@ -512,16 +512,9 @@ class PyBuildExt(build_ext):
              return ['m']
  
      def detect_modules(self):