fixes for pyinstaller scripts

build_linux.sh

 zip -r OctoTray_Linux.zip dist/*
 
 cd ../..
-mkdir -p build/dist/linux
-cp -r build/linux/OctoTray_Linux.zip build/dist/linux/
+mkdir -p build/dist
+cp -r build/linux/OctoTray_Linux.zip build/dist

build_win.sh

 cp dist/setup_win.py build/win/
 
 cd build/win
-pyinstaller --noconfirm --onefile --name=OctoTray --windowed --add-data="octotray_icon.png:." octotray.py
+pyinstaller --noconfirm --onefile --name=OctoTray --windowed --add-data="octotray_icon.png;." octotray.py
 
 cd ../..
 mkdir -p build/dist/win