configure.in: disable posix_fadvise
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46384 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: disable posix_fadvise
itself on 32-bit AIX. [ruby-core:62968] [Bug #9914]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46384 b2dd03c8-39d4-4d8f-98ff-823fe69b080e