Run script and root file systems are at:
https://github.com/groeck/linux-build-test/tree/master/rootfs/arm-v7/

bisect-arm-v7.sh is the actual bisect script.

run-arm-v7.sh is used to build the kernel and run qemu repeatedly.
This could be hand-coded if so desired; it just calls
run-qemu-arm-v7.sh from linux-build-test/ for convenience.

configuration file is multi_v7_defconfig with various additional drivers
and debug options enabled. It is generated from the scripts
at linux-build-test/.