[gn build] Port 72c04bb

Author: llvmgnsyncbot

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -1449,6 +1449,7 @@ if (current_toolchain == default_toolchain) {
       "__type_traits/aligned_storage.h",
       "__type_traits/aligned_union.h",
       "__type_traits/alignment_of.h",
+      "__type_traits/can_extract_key.h",
       "__type_traits/common_reference.h",
       "__type_traits/common_type.h",
       "__type_traits/conditional.h",
@@ -1589,7 +1590,6 @@ if (current_toolchain == default_toolchain) {
       "__utility/small_buffer.h",
       "__utility/swap.h",
       "__utility/to_underlying.h",
-      "__utility/try_key_extraction.h",
       "__utility/unreachable.h",
       "__variant/monostate.h",
       "__vector/comparison.h",