dev-python/cryptography: bump 1.5.3-r1, eapi update, fix test on first install
On first install the test would fail because it uses introspection but the
egg-info was not available. On second install it would work because introspection
would (wrongly) inspect the system installed package.
Added distutils_install_for_testing to have a complete install available for
testing.
Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=595272
Package-Manager: portage-2.3.0
Closes: https://github.com/gentoo/gentoo/pull/2746
Signed-off-by: David Seifert <soap@gentoo.org>