Reorder unwinding related builder methods to differentiate between dwarf and msvc instructions

Author: bjorn3

src/builder.rs

@@ -1256,6 +1256,10 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         aggregate_value
     }
 
+    fn set_personality_fn(&mut self, _personality: RValue<'gcc>) {
+        // TODO(antoyo)
+    }
+
     fn landing_pad(&mut self, _ty: Type<'gcc>, _pers_fn: RValue<'gcc>, _num_clauses: usize) -> RValue<'gcc> {
         let field1 = self.context.new_field(None, self.u8_type, "landing_pad_field_1");
         let field2 = self.context.new_field(None, self.i32_type, "landing_pad_field_1");
@@ -1295,10 +1299,6 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         unimplemented!();
     }
 
-    fn set_personality_fn(&mut self, _personality: RValue<'gcc>) {
-        // TODO(antoyo)
-    }
-
     // Atomic Operations
     fn atomic_cmpxchg(&mut self, dst: RValue<'gcc>, cmp: RValue<'gcc>, src: RValue<'gcc>, order: AtomicOrdering, failure_order: AtomicOrdering, weak: bool) -> RValue<'gcc> {
         let expected = self.current_func().new_local(None, cmp.get_type(), "expected");