message: start_item_riscv32: Correctly pass the app_heap_break to Rust code
diff: @@ -88,7 +88,7 @@ pub unsafe extern "C" fn _start() -> ! {
  mv a0, s0 // first arg is app_start
  mv s0, sp // Set the frame pointer to sp.
  mv a1, s1 // second arg is stacktop
  - mv a2, s2 // third arg is app_heap_break
  + mv a2, t1 // third arg is app_heap_break that we told the kernel
  jal rust_start"
  : // No output operands
  :
  