Bug#451559: Check for insecure LD_LIBRARY_PATH in wrapper scripts

[Stefan Fritsch <sf@sfritsch.de>]

The above regexp by itself will give a false positive result for 
constructs like:

if [ -n "$LD_LIBRARY_PATH" ]; then
        export LD_LIBRARY_PATH=$WINELIB:$LD_LIBRARY_PATH
else
        export LD_LIBRARY_PATH=$WINELIB
fi