[compiler-rt] [scudo] Fix release to OS logic in secondary cache. (PR #103303)

[via llvm-commits]

ChiaHungDuan wrote:

> > This is a fix, please mention that in the title and the description. In addition, I think this can be covered by the test, right? If so, please add a test case.
> 
> The main issue with testing this is that the interval at which the issue occurs is somewhat arbitrary. I can try different cache sizes and interval values to determine a point where the error occurs, but I don't think that's a robust way of testing this case. I will try coming up with a better way of testing this outside of the current `CacheOrder` test.

IIRC, we want to ensure the eviction order is still LRU. If we do a page releasing before the first eviction, we will see the wrong order happens, right?

https://github.com/llvm/llvm-project/pull/103303