LCStr: Refactor and simplify
LCStr: Refactor and simplify

- Drop constructor argument `raw_data` as it is redundant and the data
  can be obtained from the load command via `lc.view.raw_data` (and
  adapt related load commands accordingly).
- Use intermediate variables to shorten overly long line.
- Avoid storing constructor arguments in instance variables if they are
  not going to be referenced later (`@raw_data` and `@lc`).
- Improve names of instance variables.

Homebrew/ruby-macho,Homebrew/ruby-macho,woodruffw/ruby-macho,woodruffw/ruby-macho,Homebrew/ruby-macho,woodruffw/ruby-macho