Splitting the build of each components
For #17379 (moved), the gitian descriptors need to be split by component and converted in a new format.
Some of them have already been done for Tor Messenger:
- python
- binutils
- gcc
- mingw-w64
- macosx-toolchain
- tor-launcher
The main ones that are not yet done:
- the browser
- torbutton
- openssl
- tor
- the various pluggable transports