Add a list of benchmarks, applications and algorithms which are under discussion to be added to the test-suite.
I added all the benchmarks mentioned under https://llvm.org/PR34216, missing SPEC benchmarks, some image processing algorithms and a few others.
The list at https://llvm.org/PR34216 only allows adding to the discussion, not removing, commenting, adding details to individual benchmarks.
The file includes a comment mentioning a regular review to edit this file is not required (which would add a lot of churn). This review a discussion for the general format of the file, or whether to include such a file at all.
Suggested-by: Hal Finkel