Add a base class for PDB symbols.

Every PDB symbol has a type id and can be written to the
symbol record stream.

Types of symbols are defined in the Microsoft_Cci_Pdb::SYM enum.

BUG=
R=chrisha@chromium.org

Review URL: https://codereview.appspot.com/116500043

git-svn-id: http://sawbuck.googlecode.com/svn/trunk@2223 15e8cca8-e42c-11de-a347-f34a4f72eb7d
4 files changed