[LLVM-493] LLD link failure on KASLR for AArch64 Linux kernel

The linux kernel can build in an ASLR mode that is currently causing LLD
some problems. There are a few oddities in the kernel that aren't quite
right but there are some problems in LLD that need resolving as well. has
been a couple of interesting days trying to work out why some strange
options have been used.

[LLVM-484] LLD combination of dynamic relocs into a single section
Committed upstream
[LLVM-486] Error if user code defines _GLOBAL_OFFSET_TABLE_
Committed upstream
[LLVM-489] Measure (cross) linking of performance of LLD on Chrome
Performance of linking AArch64 matches X86, roughly twice as fast as
ld.gold and five times faster than ld.bfd.

[TCWG-1492] Investigated why git-clone and git-fetch might hang/deadlock.
Back up might be to put a timeout/retry.

[Other]
Submitted LLVM team goals for the TCWG team

Wrote up how TCWG use Jenkins and CI, now in Confluence.

Planned Absences:
ARM internal Compiler conference 4th/5th December
Christmas holiday 17th December - 4th January
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