Rename ReportingSection to DebugSection

src/main/scala/leon/Main.scala

src/main/scala/leon/Reporter.scala

src/main/scala/leon/Settings.scala

src/main/scala/leon/solvers/Solver.scala

src/main/scala/leon/solvers/SolverFactory.scala

src/main/scala/leon/synthesis/Rules.scala

src/main/scala/leon/synthesis/rules/Cegis.scala

src/main/scala/leon/verification/AnalysisPhase.scala