[csmith-project/creduce] f337f6: Update copyright years.

[Eric Eide <noreply@github.com>]

  Branch: refs/heads/master
  Home:   https://github.com/csmith-project/creduce
  Commit: f337f68e5ef7210eeee461cf1c702bf3ff1d5ec8
      https://github.com/csmith-project/creduce/commit/f337f68e5ef7210eeee461cf1c702bf3ff1d5ec8
  Author: Eric Eide <eeide@cs.utah.edu>
  Date:   2019-10-10 (Thu, 10 Oct 2019)

  Changed paths:
    M clang_delta/CallExprToValue.cpp
    M clang_delta/CopyPropagation.cpp
    M clang_delta/EmptyStructToInt.h
    M clang_delta/LiftAssignmentExpr.cpp
    M clang_delta/RemoveEnumMemberValue.cpp
    M clang_delta/RenameParam.cpp
    M clang_delta/ReplaceFunctionDefWithDecl.h
    M clang_delta/ReturnVoid.cpp
    M clang_delta/RewriteUtils.h
    M clang_delta/SimplifyCallExpr.cpp
    M clang_delta/Transformation.h

  Log Message:
  -----------
  Update copyright years.