integration: Fix integration tests with rust 1.33.

Alignment arrays are not needed anymore, since we have repr(align).
diff --git a/bindgen-integration/src/lib.rs b/bindgen-integration/src/lib.rs
index 04617ff..8374e20 100755
--- a/bindgen-integration/src/lib.rs
+++ b/bindgen-integration/src/lib.rs
@@ -179,7 +179,6 @@
 
     let mut second = bindings::bitfields::Second {
         _bitfield_1: bindings::bitfields::Second::new_bitfield_1(1337, true),
-        __bindgen_align: [],
     };
     assert!(unsafe { second.assert(1337, true) });
 
@@ -189,7 +188,6 @@
             false,
             bindings::bitfields::ItemKind::ITEM_KIND_TRES,
         ),
-        __bindgen_align: [],
     };
     assert!(unsafe {
         third.assert(42, false, bindings::bitfields::ItemKind::ITEM_KIND_TRES)