RFR: 8268549: Typo in file name in example for -Xlint:processing

[Piotrek Żygieło]

Presented class is public, hence it has to be defined in AnnoProc.java.

-------------

Commit messages:
 - 8268549: Typo in file name in example for -Xlint:processing

Changes: https://git.openjdk.java.net/jdk/pull/3937/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3937&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268549
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3937.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3937/head:pull/3937

PR: https://git.openjdk.java.net/jdk/pull/3937