plainbox:vendor: add python-glibc 0.6.1

This patch adds the glibc and pyglibc modules from the python-glibc
project to plainbox.vendor. They are identical to the code obtained from
the upstream tarball.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
plainbox.vendor: vendorize pyglibc 0.6.1

This patch changes all the imports in pyglibc to refer to
plainbox.vendor.glibc and plainbox.vendor.pyglibc. This makes it usable
from within plainbox.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
"automatic merge of lp:~zkrynicki/checkbox/glibc-0.6.1/ by tarmac [r=sylvain-pineau][bug=][author=zkrynicki]"