Add hook for missing platformthemes on linux

hooks/hook-PyQt5.QtGui.py

+#-----------------------------------------------------------------------------
+# Copyright (c) 2013-2016, PyInstaller Development Team.
+#
+# Distributed under the terms of the GNU General Public License with exception
+# for distributing bootloader.
+#
+# The full license is in the file COPYING.txt, distributed with this software.
+#-----------------------------------------------------------------------------
+
+
+hiddenimports = ['sip', 'PyQt5.QtCore']
+
+from PyInstaller.utils.hooks import qt5_plugins_binaries
+from PyInstaller.compat import is_linux
+
+
+binaries = []
+binaries.extend(qt5_plugins_binaries('accessible'))
+binaries.extend(qt5_plugins_binaries('iconengines'))
+binaries.extend(qt5_plugins_binaries('imageformats'))
+binaries.extend(qt5_plugins_binaries('inputmethods'))
+binaries.extend(qt5_plugins_binaries('graphicssystems'))
+binaries.extend(qt5_plugins_binaries('platforms'))
+
+if is_linux:
+    binaries.extend(qt5_plugins_binaries('platformthemes'))