File fix-sip-detection.patch of Package python-qt5

commit a028b56a1c6b10f2de86b92ccdfd31b36eedec1a
Author: Christophe Giboudeaux <christophe@krop.fr>
Date:   Sun Oct 21 11:02:27 2018 +0200

    Try to fix the sipdir detection

diff --git a/configure.py b/configure.py
index 32d03a0..f95e1f4 100644
--- a/configure.py
+++ b/configure.py
@@ -25,6 +25,7 @@ import os
 import shutil
 import stat
 import sys
+import sipconfig
 
 
 # Initialise the constants.
@@ -511,7 +512,7 @@ class TargetConfiguration:
         self.pyqt_bin_dir = py_config.bin_dir
         self.pyqt_module_dir = py_config.module_dir
         self.pyqt_stubs_dir = os.path.join(py_config.module_dir, 'PyQt5')
-        self.pyqt_sip_dir = os.path.join(py_config.data_dir, 'sip', 'PyQt5')
+        self.pyqt_sip_dir = os.path.join(sipconfig.Configuration().default_sip_dir, 'PyQt5')
         self.pyuic_interpreter = py_config.pyuic_interpreter
 
         # Remaining values.