[TCWG-1492] Add timeout and retry to git fetches in Linaro ci infrastructure. [LLVM-505] LLD implement --pic-veneer for AArch32 linux kernel (pr39886) In upstream review [LLVM-509] Add support for v6m range extension thunks to LLD In upstream review pr34928 fixed undefined weak reference handling for AArch64

Spent quite a bit of time revisiting cross-compilation of compiler-rt after helping out on llvm-dev. Posted a review D55709 to improve the documentation.

Planned Absences Next 3 weeks on Christmas holiday back Monday 7th January