[gn build] Port 427a5cf

Author: llvmgnsyncbot

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

@@ -561,6 +561,7 @@ if (current_toolchain == default_toolchain) {
       "__iterator/segmented_iterator.h",
       "__iterator/size.h",
       "__iterator/sortable.h",
+      "__iterator/static_bounded_iter.h",
       "__iterator/unreachable_sentinel.h",
       "__iterator/wrap_iter.h",
       "__locale",