Moved error-counting to Diagnostics so that errors generated during preprocessing is included in the count. Enabled logging of preprocessor diagnostics into info-log. Review URL: https://codereview.appspot.com/6354047 git-svn-id: https://angleproject.googlecode.com/svn/trunk@1177 736b8ea6-26fd-11df-bfd4-992fa37f6226