python3: fix invalid ncursesw header path

This commit adds a patch to python3 that makes sure it does not use an
invalid header path (pointing to host headers) when including ncursesw
support.

Fixes:

  http://autobuild.buildroot.org/results/9bd/9bdaa392e8dd00c6ebee156b758e3c0cac480237/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Tested-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python3/018-ncursesw-remove-wrong-includedir.patch

@@ -0,0 +1,21 @@
+Do not harcode invalid path to ncursesw headers
+
+Adding /usr/include/ncursesw is obviously invalid when
+cross-compiling. Since the ncursesw headers are no longer installed in
+usr/include/ncursesw/, but directly in usr/include, there is anyway no
+need for a special header path.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/setup.py
+===================================================================
+--- a/setup.py
++++ b/setup.py
+@@ -1287,7 +1287,6 @@
+         panel_library = 'panel'
+         if curses_library == 'ncursesw':
+             curses_defines.append(('HAVE_NCURSESW', '1'))
+-            curses_includes.append('/usr/include/ncursesw')
+             # Bug 1464056: If _curses.so links with ncursesw,
+             # _curses_panel.so must link with panelw.
+             panel_library = 'panelw'