[gn build] Port 23e1ed6

Author: llvmgnsyncbot

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

@@ -384,6 +384,9 @@ if (current_toolchain == default_toolchain) {
       "__concepts/totally_ordered.h",
       "__condition_variable/condition_variable.h",
       "__config",
+      "__configuration/abi.h",
+      "__configuration/compiler.h",
+      "__configuration/platform.h",
       "__coroutine/coroutine_handle.h",
       "__coroutine/coroutine_traits.h",
       "__coroutine/noop_coroutine_handle.h",