ptr: implement "const_slice_ptr" and "mut_slice_ptr" lang items

src/libcore/ptr/const_ptr.rs

@@ -706,6 +706,10 @@ pub fn align_offset(self, align: usize) -> usize
     }
 }
 
+#[cfg(not(bootstrap))]
+#[lang = "const_slice_ptr"]
+impl<T> *const [T] {}
+
 // Equality for pointers
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> PartialEq for *const T {

src/libcore/ptr/mut_ptr.rs

@@ -894,6 +894,10 @@ pub fn align_offset(self, align: usize) -> usize
     }
 }
 
+#[cfg(not(bootstrap))]
+#[lang = "mut_slice_ptr"]
+impl<T> *mut [T] {}
+
 // Equality for pointers
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> PartialEq for *mut T {