* configure.in: Consider error messages to find out version option of
  C compiler.
  The C compiler of Sun Studio C emits "Warning: Option -qversion
  passed to ld, if ld is invoked, ignored otherwise" and exit
  successfully.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40796 b2dd03c8-39d4-4d8f-98ff-823fe69b080e