Fangrui Song 8f72b0cb08 [ELF] Fix INCLUDE cycle detection ...

Fix #93947: the cycle detection mechanism added by
https://reviews.llvm.org/D37524 also disallowed including a file twice,
which is an unnecessary limitation.

Now that we have an include stack #100493, supporting multiple inclusion
is trivial. Note: a filename can be referenced with many different
paths, e.g. a.lds, ./a.lds, ././a.lds. We don't attempt to detect the
cycle in the earliest point.

2024-07-27 17:25:13 -07:00

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