Update rustsbi-k210 to enable lagacy console_putchar. Adjust alignment of links apps. Run matrix on K210!

os/build.rs

@@ -47,6 +47,7 @@ _app_names:"#)?;
     .section .data
     .global app_{0}_start
     .global app_{0}_end
+    .align 12
 app_{0}_start:
     .incbin "{2}{1}"
 app_{0}_end:"#, idx, app, TARGET_PATH)?;

os/src/main.rs

@@ -43,6 +43,7 @@ pub fn rust_main() -> ! {
     mm::init();
     mm::remap_test();
     task::add_initproc();
+    println!("after initproc!");
     trap::init();
     trap::enable_timer_interrupt();
     timer::set_next_trigger();