[llvm] [TextAPI] Track RPaths in the order its provided via command line. (PR #131665)

[Cyndy Ishida via llvm-commits]

cyndyishida wrote:

> It looks like this is causing failures on the reverse-iteration buildbot: 

@efriedma-quic Sorry, this took me a bit longer than I expected (got busy with other tasks), but a resolution is posted in https://github.com/llvm/llvm-project/pull/139087 

https://github.com/llvm/llvm-project/pull/131665