Fix errors with Javadoc 8

`sbt dotty-interfaces/publishLocal` fails for me, fix enough errors to
make it work.

Author: Blaisorblade

interfaces/src/main/java/dotty/tools/dotc/interfaces/CompilerCallback.java

@@ -5,7 +5,7 @@
  *  You should implement this interface if you want to react to one or more of
  *  these events.
  *
- *  @see the method `process` of `dotty.tools.dotc.Driver` for more information.
+ *  See the method `process` of `dotty.tools.dotc.Driver` for more information.
  */
 public interface CompilerCallback {
   /** Called when a class has been generated.

interfaces/src/main/java/dotty/tools/dotc/interfaces/SimpleReporter.java

@@ -5,7 +5,7 @@
  *  You should implement this interface if you want to handle the diagnostics
  *  returned by the compiler yourself.
  *
- *  @see the method `process` of `dotty.tools.dotc.Driver` for more information.
+ *  See the method `process` of `dotty.tools.dotc.Driver` for more information.
  */
 public interface SimpleReporter {
   /** Report a diagnostic. */