configure.in: install_name without teeny
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60018 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: install_name without teeny
to allow link extension libraries for the same minor version.
patched by kimuraw (Wataru Kimura) at [ruby-dev:50262].
[Bug #13931]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60018 b2dd03c8-39d4-4d8f-98ff-823fe69b080e