Adding fake CDLL object to satisfy pip installer.

Author: ppisl

graalpython/lib-graalpython/ctypes.py

@@ -37,3 +37,19 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+# Taken from pypy
+class CDLL(object):
+    """An instance of this class represents a loaded dll/shared
+    library, exporting functions using the standard C calling
+    convention (named 'cdecl' on Windows).
+
+    The exported functions can be accessed as attributes, or by
+    indexing with the function name.  Examples:
+
+    <obj>.qsort -> callable object
+    <obj>['qsort'] -> callable object
+
+    Calling the functions releases the Python GIL during the call and
+    reacquires it afterwards.
+    """
+    pass