Use abort() when panicking

ctru-sys/src/sys/libc.rs

@@ -7,5 +7,6 @@ pub enum c_void {
 }
 
 extern "C" {
+    pub fn abort() -> !;
     pub fn write(fd: i32, buf: *const c_void, count: usize) -> isize;
 }

src/lib.rs

@@ -20,5 +20,5 @@ pub use sdmc::Sdmc;
 extern "C" fn eh_personality() {}
 #[lang = "panic_fmt"]
 fn panic_fmt() -> ! {
-    loop {}
+    unsafe { libctru::libc::abort() }
 }