[clang] [clang][DependencyScanning] Track modules that resolve from sysroot. (PR #130634)

[Michael Spencer via cfe-commits]

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@@ -843,7 +864,7 @@ void ModuleDepCollectorPP::addModuleDep(
         !MDC.isPrebuiltModule(Import)) {
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Bigcheese wrote:

I think that's fine as long as the current patch says that pre built modules means it's not in sysroot, as I think that's a small addition and keeps it conservatively correct.

https://github.com/llvm/llvm-project/pull/130634