[PyQt] QScintilla's dll is only install qt/lib on win32

[Andreas Pakulat]

Hi,

I just wanted to install eric4 and the first try to execute python
install.py failed because QScintilla's qscintilla2.dll isn't installed
into Qt's bin dir. It only is installed into qt/lib and thus
applications needing the dll don't start (on windows dll's have to be in
PATH) including the install.py importing qscintilla2.

Andreas

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