Mark drop calls in landing pads cold instead of noinline

Now that deferred inlining has been disabled in LLVM,
this shouldn't cause catastrophic size blowup.

compiler/rustc_codegen_ssa/src/traits/builder.rs

@@ -311,5 +311,5 @@ pub trait BuilderMethods<'a, 'tcx>:
     ) -> Self::Value;
     fn zext(&mut self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
 
-    fn do_not_inline(&mut self, llret: Self::Value);
+    fn mark_callsite_cold(&mut self, llret: Self::Value);
 }