merge revision(s) r45724: [Backport #9776]

	* compile.c (compile_array_): make copy a first hash not to modify
	  the argument itself.  keyword splat should be non-destructive.
	  [ruby-core:62161] [Bug #9776]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@46451 b2dd03c8-39d4-4d8f-98ff-823fe69b080e