matplotlib: Fix building/installing

mingw-w64-python-matplotlib/setup.py.patch

@@ -0,0 +1,11 @@
+--- old/setup.py	2014-08-26 04:24:27.000000000 +0200
++++ new/setup.py	2014-09-18 23:28:32.597091000 +0200
+@@ -97,7 +97,7 @@
+     setupext.BackendGtk3Agg(),
+     setupext.BackendGtk3Cairo(),
+     setupext.BackendGtkAgg(),
+-    setupext.BackendTkAgg(),
++    #setupext.BackendTkAgg(),
+     setupext.BackendWxAgg(),
+     setupext.BackendGtk(),
+     setupext.BackendAgg(),