message: [FileSystem] Migrate MonitoringProcessLauncher
  Use the FileSystem helpers instead of using the file system directly.
diff: #include "lldb/Host/HostProcess.h"
  #include "lldb/Target/ProcessLaunchInfo.h"
  #include "lldb/Utility/Log.h"
  -#include "lldb/Utility/Status.h"
  #include "llvm/Support/FileSystem.h"
  @@ -30,20 +29,16 @@ MonitoringProcessLauncher::LaunchProcess(const ProcessLaunchInfo &launch_info,
  error.Clear();
  + FileSystem &fs = FileSystem::Instance();
  FileSpec exe_spec(resolved_info.GetExecutableFile());
  - llvm::sys::fs::file_status stats;
  - status(exe_spec.GetPath(), stats);
  - if (!exists(stats)) {
  + if (!fs.Exists(exe_spec))
  FileSystem::Instance().Resolve(exe_spec);
  - status(exe_spec.GetPath(), stats);
  - }
  - if (!exists(stats)) {
  +
  + if (!fs.Exists(exe_spec))
  FileSystem::Instance().ResolveExecutableLocation(exe_spec);
  - status(exe_spec.GetPath(), stats);
  - }
  - if (!exists(stats)) {
  + if (!fs.Exists(exe_spec)) {
  error.SetErrorStringWithFormatv("executable doesn't exist: '{0}'",
  exe_spec);
  return HostProcess();
  