message: swig/README.md formatting
diff: ## More explicit native crashes
  When you get a native crash log and the libtorrent function names are not explicit, if you can replicate the crash
  -update the `swig/config/android-<arch>-config.jam` file and set the `<cxxflag>-fvisibility=default` (instead of `hidden`)
  -and you will be able to get closer to the crash, usually a nullptr dereference.
  +update the `swig/config/android-<arch>-config.jam` file and set the `<cxxflag>-fvisibility=default` (instead of `hidden`),
  +rebuilt with symbol visibility on and and you will be able to get closer to the crash in C++ land, usually a `nullptr` dereference.
  ## Isolating native crashes in adb logcat using ndk-stack
  -Make sure your `android-ndk-r<version>` folder is in the `$PATH` and invoke adb logcat like this
  +Make sure your `android-ndk-r<version>` folder is in the `$PATH` and invoke `adb logcat` like this
  `adb logcat | ndk-stack -sym <path-to-shared-library-folder>`
  