Fixed bug 2812 - Make libSDL2main.a usable on Android via a dummy symbol

Jonas Kulla

This eliminates the need to manually compile in SDL_main_android.c.
Instead, add "-lSDL2main -Wl,-u,SDL_main_dummy" when linking.

I don't know how the nkd-build process works, but unless it was
for some reason linking libSDL2main.a it should be unaffected.

#!/bin/bash

./testharness.exe --config testsprite2_crashtest.config > testrun.log 2>&1

if [ "$?" != "0" ]; then

  echo TEST RUN FAILED (see testrun.log)

  # report error code to CI

fi