UNALIGNED_WORD_ACCESS on ppc64
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46915 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
UNALIGNED_WORD_ACCESS on ppc64
add PowerPC64 too, which is capable to access unaligned words.
patched by Gustavo Frederico Temple Pedrosa in [ruby-core:63937].
[Feature #10081]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46915 b2dd03c8-39d4-4d8f-98ff-823fe69b080e