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Re-re-apply "[ORC][ORC-RT] Add initial native-TLV support to MachOPlatform."

Authored by lhames on Jul 21 2021, 12:38 AM.

Description

Re-re-apply "[ORC][ORC-RT] Add initial native-TLV support to MachOPlatform."

This reapplies commit a7733e9556b5a6334c910f88bcd037e84e17e3fc ("Re-apply
[ORC][ORC-RT] Add initial native-TLV support to MachOPlatform."), and
d4abdefc998a1ee19d5edc79ec233774cbf64f6a ("[ORC-RT] Rename macho_tlv.x86-64.s
to macho_tlv.x86-64.S (uppercase suffix)").

These patches were reverted in 48aa82cacbff10e1c5395a03f86488bf449ba4da while I
investigated bot failures (e.g.
https://lab.llvm.org/buildbot/#/builders/109/builds/18981). The fix was to
disable building of the ORC runtime on buliders using ccache (which is the same
fix used for other compiler-rt projects containing assembly code). This fix was
commited to llvm-zorg in 490633945677656ba75d42ff1ca9d4a400b7b243.