Add scripts to check the virtual memory integrity against vmlinux binary

 It's only works for sys_open, but it's still a WIP PoC.
 We can detect if we hijack the syscall. (i.e. overwrite syscall's
 content)

 this can be bypassable if the rootkit write its new version in the
 vmlinux file.

 We will checksum the vmlinux binary, to fix this.