Fixed #95, LD_PRELOAD 

Well, this means that `LD_PRELOAD` cant find the library `libsigchain.so` (Is and android lib so we dont need it here * i think) , this happends because `LD_PRELOAD`(a enviroment var) **is inherited from the  android enviroment**.

The lib `libsigchain.so` is located at `/system/lib/` (from phone root)

So, if we add the next line to bootkali && killkali:

    unset LD_PRELOAD

 Errors gone.
 
 Jaime

@binkybear #95