CANCELLED due to holidays - RISC-V LLVM sync-up call 2nd Jan 2020

As discussed in the last call before christmas, we will be skipping
the sync-up call this week. The general feeling was that people won't
have had enough time to get back up to speed for it to be worthwhile
this week. We will resume calls at the normal time (4pm GMT Thursdays)
from next week, Jan 9th.