renoshell - rename/notify temp root shell

A get root shell tool using remote arbitrary kernel space read and write api, which needs to be provided by another tool with an actual kernel exploit. This is forked from iovyroot by dosomder, replacing dependency on a specific vulnerability with a remote arbitrary kernel space read/write primitives. The code was debugged, fixed and adapted to be compatible with 4.4.74 kernel from xperia xz1c 47.1.A.2.324 android oreo firmware (includes selinux bypass).