[PATCH] D47558: Simplify `ld.lld --help` message.

[Rui Ueyama via Phabricator via llvm-commits]

ruiu created this revision.
ruiu added a reviewer: pcc.
Herald added subscribers: arichardson, emaste, srhines.
Herald added a reviewer: espindola.

Previously, we printed out two lines of help messages for `--foo bar`
and `--foo=bar` like this:

  --soname=<value>        Set DT_SONAME
  --soname <value>        Set DT_SONAME
  --sort-section=<value>  Specifies sections sorting rule when linkerscript is used
  --sort-section <value>  Specifies sections sorting rule when linkerscript is used

This change eliminates duplicate lines that doesn't contain `=` for such
options like this.

  --soname=<value>        Set DT_SONAME
  --sort-section=<value>  Specifies sections sorting rule when linkerscript is used


https://reviews.llvm.org/D47558

Files:
  lld/ELF/Options.td

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