perf: fix broken shell comparsion in do_install

The patch was sponsored by sysmocom

Signed-off-by: Henning Heinold <henning@itconsulting-heinold.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
perf: add slang to the dependencies

* TUI/GUI support was added in 2.6.35 based on libnewt
* since 3.10 slang replaced libnewt completly
* changing TUI_DEFINES is not necessary, because NO_NEWT is
  still respected with newer kernels
* add comment about the gui history to the recipe

The patch was sponsored by sysmocom

Signed-off-by: Henning Heinold <henning@itconsulting-heinold.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
perf: split packging

* some fundamental perf commands can work
  without the dependency on perl, python or bash
  make them separate packages and RSUGGEST them

* bump PR

The patch was sponsored by sysmocom

Signed-off-by: Henning Heinold <henning@itconsulting-heinold.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>