Based on the output of iwyu. A full rebuild of llvm-project doesn't exhibit any
significant false dependencies.
The impact on preprocessed output is larger than expected, given the small
amount of changes
$ clang++ -E -Iinclude -I../llvm/include ../llvm/lib/TextAPI/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l
before: 635319
After: 643716
Discourse thread on the topic: https://llvm.discourse.group/t/include-what-you-use-include-cleanup
TextAPI/ELF has moved out into InterfaceStubs, so theres no longer a
need to seperate out TextAPI between formats.
Reviewed By: ributzka, int3, #lld-macho
Differential Revision: https://reviews.llvm.org/D99811
