Fix support for dynamic keys. (#8273)

	* Skip RBS test.
	---
	 cont.c                               |  8 +++-----
	 spec/ruby/core/fiber/storage_spec.rb | 14 ++++++++++++++
	 tool/rbs_skip_tests                  |  2 ++
	 3 files changed, 19 insertions(+), 5 deletions(-)