* ext/zlib/extconf.rb: Use an exception instaed of bare puts.

	* ext/psych/extconf.rb: Use an exception instaed of bare abort.

	* ext/fiddle/extconf.rb: Use an exception instaed of bare abort.

	* ext/readline/extconf.rb: Use an exception instead of bare exit.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@36930 b2dd03c8-39d4-4d8f-98ff-823fe69b080e