extmk.rb: split notes

	* ext/extmk.rb: split notes and echo per lines, for multiple lines
	  messages.  [ruby-core:79475] [Bug #13200]
	openssl: fix broken openssl check

	* ext/openssl/extconf.rb: check for broken OpenSSL only on mac OS.
	  [ruby-core:79475] [Bug #13200]
	openssl: fix broken openssl check

	* ext/openssl/deprecation.rb: check for broken OpenSSL only on mac
	  OS.  [ruby-core:79475] [Bug #13200]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e