Trevor Gross
22579364d8
`mem` only enables the unmangled names; the functions are always available via mangled names, so this doesn't have any purpose in our tests. Thus, remove it from `builtins-test`. The remaining `feature = "mem"` configuration in tests is for the `aeabi_mem*` files, which call the compiler-builtins functions via extern definitions. Move these to builtins-test-intrinsics, which is the home of other tests that require unmangled symbols. Unfortunately these tests have apparently not worked for a long time; this situation is unchanged.
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