Update the API we for setting the alloc error handler (#71)

* Update the API we for setting the alloc error handler

* Added missing feature decl

Author: alex

src/allocator.rs

@@ -1,4 +1,4 @@
-use core::alloc::{AllocErr, GlobalAlloc, Layout};
+use core::alloc::{GlobalAlloc, Layout};
 
 use bindings;
 use c_types;
@@ -21,7 +21,7 @@ unsafe impl GlobalAlloc for KernelAllocator {
     }
 }
 
-#[lang = "oom"]
-extern "C" fn oom(_err: AllocErr) -> ! {
+#[alloc_error_handler]
+extern "C" fn oom(_layout: Layout) -> ! {
     panic!("Out of memory!");
 }

src/lib.rs

@@ -1,5 +1,5 @@
 #![no_std]
-#![feature(alloc, allocator_api, const_fn, lang_items, panic_handler)]
+#![feature(alloc, allocator_api, const_fn, lang_items, panic_handler, alloc_error_handler)]
 
 #[macro_use]
 extern crate alloc;