Bug#1031489: temporary fix

[Alexander Procenko]

qt software uses
libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0×00007f0e27e00000)
pastebin.com/raw/qNyjpFsv
but load
/usr/lib/x86_64-linux-gnu/nvidia/legacy-340xx/libGL.so.1
and gives Segmentation Fault
if add this
export QT_XCB_GL_INTEGRATION=none
export QT_OPENGL=software
and starting trough
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGL.so qbittorrent
software starting without error