Add a dependency on the bitflags crate

Cargo.toml

@@ -11,3 +11,4 @@ rlibc = "1.0"
 volatile = "0.1.0"
 spin = "0.4.5"
 multiboot2 = "0.1.0"
+bitflags = "0.7.0"

src/lib.rs

@@ -8,6 +8,8 @@ extern crate rlibc;
 extern crate volatile;
 extern crate spin;
 extern crate multiboot2;
+#[macro_use]
+extern crate bitflags;
 
 #[macro_use]
 mod vga_buffer;