Revert "Use the ROOT env var in generated system calls too"
Revert "Use the ROOT env var in generated system calls too"

The ROOT env var should be taken into account when
executing any command. It defines the location where
the actual commands should be rooted at.

This reverts commit 4d89af8ee5f1ddac0a4defefde6575de1009f557.
snusnu/testor