(E)LTS report for December

[Emilio Pozuelo Monfort]

Hi,

During December I spent 41.5h on LTS working on:
- security-tracker improvements (looking at issue in 8795311f)
- firefox-esr toolchain updates (cargo, cbindgen, as well as supporting Roberto 
with LLVM and rust)
- firefox-esr update
- thunderbird update
- CVE triaging

I also spent 10h on ELTS working on:

- vim
- linux-4.9 update
- CVE triaging

Cheers,
Emilio