pythonPackages.cairocffi: support 1.0 and 0.9

This patch ensures that Python2 can be used if cairocffi is used.
Version 1.0 dropped Python 2 support.

pkgs/development/python-modules/cairocffi/dlopen-paths.patch

@@ -1,4 +1,4 @@
-commit 705dc9a55bd160625d9996e63fc7dc532d0ad0ab
+commit 0435bc2577d4b18f54b78b2f5185abb2b2005982
 Author: Alexander V. Nikolaev <avn@avnik.info>
 Date:   Sat Feb 6 08:09:06 2016 +0200
 
@@ -7,12 +7,12 @@ Date:   Sat Feb 6 08:09:06 2016 +0200
     This patch is NixOS specific
 
 diff --git a/cairocffi/__init__.py b/cairocffi/__init__.py
-index 718aa7f..1a1dcff 100644
+index 6061973..3538a58 100644
 --- a/cairocffi/__init__.py
 +++ b/cairocffi/__init__.py
-@@ -27,20 +27,22 @@ VERSION = '0.7.2'
- version = '1.10.0'
- version_info = (1, 10, 0)
+@@ -21,19 +21,22 @@ VERSION = __version__ = (Path(__file__).parent / 'VERSION').read_text().strip()
+ version = '1.16.0'
+ version_info = (1, 16, 0)
  
 +# Use hardcoded soname, because ctypes.util use gcc/objdump which shouldn't be required for runtime
 +_LIBS = {
@@ -26,13 +26,12 @@ index 718aa7f..1a1dcff 100644
 +def dlopen(ffi, name, *names):
      """Try various names for the same library, for different platforms."""
 -    for name in names:
--        for lib_name in [name, 'lib' + name]:
+-        for lib_name in (name, 'lib' + name):
 -            try:
 -                path = ctypes.util.find_library(lib_name)
--                if path:
--                    lib = ffi.dlopen(path)
--                    if lib:
--                        return lib
+-                lib = ffi.dlopen(path or lib_name)
+-                if lib:
+-                    return lib
 -            except OSError:
 -                pass
 -    raise OSError("dlopen() failed to load a library: %s" % ' / '.join(names))
@@ -44,4 +43,4 @@ index 718aa7f..1a1dcff 100644
 +    raise OSError("dlopen() failed to load a library: %s as %s" % (name, path))
  
  
- cairo = dlopen(ffi, 'cairo', 'cairo-2')
+ cairo = dlopen(ffi, 'cairo', 'cairo-2', 'cairo-gobject-2', 'cairo.so.2')