Remove @see comments

These comments are burdensome to maintain as they quickly fall out of
date when the code is refactored. And they are unnecessary with modern
IDEs anyway, thanks to knowledge of the AST (e.g., ^T in Eclipse).

This was done using the script:
https://github.com/ctrueden/ctr-scripts/blob/master/one-offs/non-javadoc-purge
CommandLineLinker: clean up protected add* methods

There are eight methods which are all protected, and add various
types of arguments to the args vector. This commit makes three
sorts of changes to the API:

1) Because these methods were abstract, many subclasses implemented
   empty versions of them. To reduce the amount of code, this commit
   changes CommandLineLinker to provide empty default implementations,
   so that subclasses need only override behavior they wish to modify.

2) These methods did not pass the CCTask down the line, and hence no
   logging was possible from subclasses, since Ant's logging mechanism
   derives from the Task class. This commit adds a CCTask argument to
   each of the eight methods, and updates downstream code accordingly.

3) Unify visibility of all subclass overrides. Some of them were
   previously public; now they all remain protected.

Lastly, because this change breaks backwards compatibility, we bump the
POM to the next major version (2.0.0-SNAPSHOT) as dictated by SemVer.
Merge branch 'linker-cleanup'

This branch updates the CommandLineLinker API to pass the
CCTask down the line, enabling logging from linker subclasses.