merge revision(s) 41245: [Backport #8513]

	* array.c (FL_SET_EMBED): shared object is frozen even when get
	  unshared.

	* array.c (rb_ary_modify): ARY_SET_CAPA needs unshared array.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41323 b2dd03c8-39d4-4d8f-98ff-823fe69b080e