o Set RUBY_HAS_ARCHLIB=yes for Ruby packages including archtecture depending
extention library in order to depend more specific Ruby.
o Apply some bug fixes.
* ext/zlib/zlib.c (zstream_end): should return value.
* ext/zlib/zlib.c (rb_deflate_s_deflate, rb_inflate_s_inflate): ensure
freeing internal zstreams. fixed: [ruby-dev:25309]
* ext/zlib/zlib.c (rb_deflate_init_copy): replace rb_deflate_clone.