tools/llvm-readobj currently contains tests that are either general for
all file types or that mix file types inside. This patch refactors
these test and leaves only general tests in that folder. All other
tests were moved to ELF/COFF/MachO and wasm accordingly.
I tried to minimize amount of changes, so most of the test parts
remained unchanged (except comments added/changed).
Any further refactorings and improvements for
particular tests should be done independently from this patch.
Delete "a".
The comment says it's testing that the alias can be used, but what about the normal switch?