[libc] Fix Memory Benchmarks code after rename

#if defined(LIBC_BENCHMARK_FUNCTION_MEMCPY)

#define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_MEMCPY

using BenchmarkHarness = CopyHarness;

using BenchmarkSetup = CopySetup;

#elif defined(LIBC_BENCHMARK_FUNCTION_MEMSET)

#define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_MEMSET

using BenchmarkHarness = SetHarness;

using BenchmarkSetup = SetSetup;

#elif defined(LIBC_BENCHMARK_FUNCTION_BZERO)

#define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_BZERO

using BenchmarkHarness = SetHarness;

using BenchmarkSetup = SetSetup;

#elif defined(LIBC_BENCHMARK_FUNCTION_MEMCMP)

#define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_MEMCMP

using BenchmarkHarness = ComparisonHarness;

using BenchmarkSetup = ComparisonSetup;

#else

#error "Missing LIBC_BENCHMARK_FUNCTION_XXX definition"

#endif

struct MemfunctionBenchmarkBase : public BenchmarkHarness {

struct MemfunctionBenchmarkBase : public BenchmarkSetup {

  MemfunctionBenchmarkBase() : ReportProgress(isatty(fileno(stdout))) {}

  virtual ~MemfunctionBenchmarkBase() {}

protected:

  Study createStudy() {

    Study Study;

    // Harness study.

    // Setup study.

    Study.StudyName = StudyName;

    Runtime &RI = Study.Runtime;

    RI.Host = HostState::get();

    Benchmark.reset(new MemfunctionBenchmarkSweep());

  else

    Benchmark.reset(new MemfunctionBenchmarkDistribution(getDistributionOrDie(

        BenchmarkHarness::Distributions, SizeDistributionName)));

        BenchmarkSetup::getDistributions(), SizeDistributionName)));

  writeStudy(Benchmark->run());

}