Set FAKETIME date in a format understood by faketime
reproducible_init: set DEB_HARDENNING_* variables
Remove ubuntu-lucid target, and replace with distributions detection

Set var/build_python and var/link_yasm based on distribution, instead of
target.
tor-browser: update git_hash
tor-browser: verify tag gpg signature
Fix variable name used to decide if we need python
pyptlib: add stable git_hash
pyptlib: verify tag gpg sig in stable target
tbb: update version, and add stable target
Add the include_pt target

When the include_pt target is selected, pyptlib is included in tbb.