more improvements to runtime initialization: - replaced HotSpotSymbol with native method for reading a symbol - moved more ForeignCallDescriptors to HotSpotBackend to reduce class initialization

function main() {  
  i = 0;  
  sum = 0;  
  while (i <= 10000) {  
    sum = sum + i;  
    i = i + 1;  
  }  
  return sum;  
}