[llvm-nm] Fix how inlined dylibs are reported from tbd files (#134498)
An Inlined library is a dylib that is reexported from an umbrella or
top-level library. When this is encoded in tbd files, ensure we are
reading the symbol table from the inlined library when
`--add-inlinedinfo` is used as opposed to the top-level lib.
resolves: rdar://147767733