terminal: wait for terminal task to finish before procedding
This commit generalizes the work done in [1] and [2], both fixing
issues on several areas (the former with -c patch and gnome-terminal and
the latter with -c menuconfig and several terminals, including
gnome-terminal and tmux). The main idea is to get the PID
from the new spawned terminal and loop there until finished.
[1]
76e8ab47c9: terminal: Fix gnome-terminal to work with recent versions
[2]
7d02ea283b: cml1.bbclass: wait until menuconfig terminal finishes
Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
