(easy) Refactor FOLLY_LAMBDA_CONSTEXPR

Summary: This change was supposed to be in D32607012 (https://github.com/facebook/folly/commit/fc80a3aa0ad74179e3ce1808a18ff104d60d86ca), but didn't make it in.

Reviewed By: praihan

Differential Revision: D32928488

fbshipit-source-id: 1ae34297f42fe2cefc7e58a41787b7b3c5f158ae

folly/functional/Invoke.h

@@ -434,7 +434,7 @@ struct invoke_traits : detail::invoke_traits_base<I> {
  */
 #define FOLLY_INVOKE_QUAL(funcpath)                    \
   [](auto&&... __folly_param_a)                        \
-      FOLLY_LAMBDA_CONSTEXPR FOLLY_DETAIL_FORWARD_BODY( \
+      FOLLY_CXX17_CONSTEXPR FOLLY_DETAIL_FORWARD_BODY( \
           funcpath(FOLLY_DETAIL_FORWARD_REF(__folly_param_a)...))
 
 /***