Make the wheezy chroot use proscribed tools

The wheezy chroot relied on the pylint and pep8 packages supplied by
wheezy, which do not match the ones stated in our developer notes. This
patch fixes this by specifying the versions explicitly.

Signed-off-by: Hrvoje Ribicic <riba@google.com>
Reviewed-by: Helga Velroyen <helgav@google.com>

Cherry-picked from: e17541b7e5586ddf6bd360d8630982150cc999e9

Signed-off-by: Niklas Hambuechen <niklash@google.com>
build_chroot: make group configurable and add documentation

This improves the 'build_chroot' script in two ways:
- It is now possible to configure the group of non-root
  users that can use the chroot.
- Some documentation about the configuration of various
  fstab files is added.

Signed-off-by: Helga Velroyen <helgav@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>

Cherry-picked from: 8596d0142af3f0dbec9a92b8a99f1bd567cda349

Signed-off-by: Niklas Hambuechen <niklash@google.com>
devel/build_chroot: fix typo id DIST_RELEASE conditional

Dispatch on the value of the DIST_RELEASE variable,
not its name.

Signed-off-by: Gerard Oskamp <gjo@google.com>
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Petr Pudlak <pudlak@google.com>

Cherry-picked from: e5a0e3d22c96e6d7b17416d9ab3cefb732c26998

Signed-off-by: Niklas Hambuechen <niklash@google.com>