update submodules

[nalajcie]

• libphoenix 891d7fc...f7cac36 (3):

  string: Fix bcopy() function header
  stdio: add returning eof and converting to char for a few functions in file.c
  stdio: apply clang-format for file.c

• phoenix-rtos-devices 71c7034...4407579 (1):

  uart16550: fix device ports registration

• phoenix-rtos-hostutils a0dccbf...235df5a (1):

  psu: hangs while sending the last packet

• phoenix-rtos-kernel b72f808...e7ff559 (3):

  hal/ia32/console-serial.c: change default baudrate from 400bps to 115200bps
  proc: exceptions: better check for being in kernel
  scheduler: Fixed mapp being used as indicator if pmap is present

• phoenix-rtos-lwip a7d1669...259a481 (1):

  ci: add rootfs artifact

• phoenix-rtos-utils 7f90f9e...725427d (1):

  psh: temporairly disable TAB-completion

• plo 8c6db6d...5dfe7a5 (1):

  add makefile rule for building base image only