iotop: add new package

iotop: add new package

Iotop identifies processes that use high amount of input/output requests
on your machine. It is similar to the well known top utility, but
instead of showing you what consumes CPU the most, it lists processes by
their IO usage. Inspired by iotop Python script from Guillaume
Chazarain, rewritten in C by Vyacheslav Trushkin and improved by Boian
Bonev so it runs without Python at all.

Note that only targets that have KERNEL_TASKSTATS enabled will be able
to build this package.

Build system: x86/64
Build-tested: bcm27xx/bcm2712
Run-tested: bcm27xx/bcm2712

Signed-off-by: John Audia <redacted>