1) the branch name is only useful when distributing the snapcraft.yaml alone -
when it is part of a git tree, the branch name should be omitted if the
intention is to snap the branch containing the snapcraft.yaml file itself

2) SQUASHFs is not a separate module anymore (see
da89f0b2)

3) d101m_ucode.bin, d101s_ucode.bin and d102e_ucode.bin are only necessary when
using an Intel(R) PRO/100 nic, while the main amd64 target is kvm (and that uses
an Intel e1000 firmware-less nic)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>