make.sh: Reformat kernel section.
Support emulation of an ARM environment on Intel systems.

qemu-user is used to emulate an ARM chroot environment
that is used to compile the system for ARM target systems.
Make it a proper login shell when entering the build chroot.
make.sh: Remove KGCC variable.

This has been unused since a long time any way.
make.sh: Remove C{,XX}2FLAGS.
make.sh: Add more information to the chroot bash prompt.
sudo: Update to 1.8.10p3.

Disable linking against PAM which is not configured
in IPFire 2.
Merge remote-tracking branch 'ms/native-arm-compiling' into next
Merge branch 'sudo-without-pam' into next