clang-format: [Java] Allow trailing semicolons after enums.

Before:
  enum SomeThing { ABC, CDE }
  ;

After:
  enum SomeThing { ABC, CDE };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221125 91177308-0d34-0410-b5e6-96231b3b80d8