cli: Change --crate-only short option from -o to -C
cli: Change --crate-only short option from -o to -C

 For consistency with new options about to be added.

Signed-off-by: Mohammad AlSaleh <6c225a8dcf0f3ea8ab31a8a88dea0c937d544fc7@gmail.com>

rust-alt/cargo-esr