Use recent libffi and cffi

Author: clayote

pythonforandroid/recipes/cffi/__init__.py

@@ -7,7 +7,7 @@ class CffiRecipe(CompiledComponentsPythonRecipe):
     Extra system dependencies: autoconf, automake and libtool.
     """
     name = 'cffi'
-    version = '1.15.1'
+    version = '2.0.0'
     url = 'https://pypi.python.org/packages/source/c/cffi/cffi-{version}.tar.gz'
 
     depends = ['setuptools', 'pycparser', 'libffi']

pythonforandroid/recipes/libffi/__init__.py

@@ -14,7 +14,7 @@ class LibffiRecipe(Recipe):
         - `libltdl-dev` which defines the `LT_SYS_SYMBOL_USCORE` macro
     """
     name = 'libffi'
-    version = 'v3.4.2'
+    version = 'v3.5.2'
     url = 'https://github.com/libffi/libffi/archive/{version}.tar.gz'
 
     patches = ['remove-version-info.patch']