runtime: kotlinNativeMain should return status code and main should return it to the system

(cherry picked from commit acef5ed7e2f7e1d9478d77a1d3405873a7537db1)

runtime/src/main/cpp/launcher.cpp

@@ -1,9 +1,8 @@
 #include "Memory.h"
 
-extern "C" void kotlinNativeMain();
+extern "C" int kotlinNativeMain();
 
 int main() {
   InitMemory();
-  kotlinNativeMain();
-  return 0;
+  return kotlinNativeMain();
 }