merge revision(s) 45701: [Backport #9771]

	* ext/openssl/ossl_asn1.c (ossl_asn1_initialize): SYMID on a value
	  other than Symbol is an undefined behavior.  fix up r31699.
	  [ruby-core:62142] [Bug #9771]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@46200 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 45716: [Backport #9665]

	* configure.in (rb_cv_func___builtin_unreachable): try with an
	  external variable not only by a warning, which might not be
	  shown due to the optimization.  [ruby-core:61647] [Bug #9665]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@46201 b2dd03c8-39d4-4d8f-98ff-823fe69b080e