I'm using warrior branch ( 2.7.1 ), built with Qualcomm snapdragon 845c board (manifests, linux kernel: linux-linaro-qcomlt/5.2-r0) , and put
IMAGE_INSTALL_append = " android-tools"
to install adb daemon, but it doesn't start up, and I see /usr/bin/android-setup-gadget, there is no /system/build.prop , /sys/class/android_usb/* files to operate on
adbd --help will return segmentation fault