Translations:Upgrading GCC/51/ja


 * https://bugs.gentoo.org/show_bug.cgi?id=513386
 * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61758
 * https://blogs.gentoo.org/blueness/2015/03/10/the-c11-abi-incompatibility-problem-in-gentoo/
 * http://stackoverflow.com/a/16196475