Add 1.4.7-R0.1 versioned CB (new safeguard) to obf

The 1.4.7 safeguard uses the major version with an internal revision number;
where the old 1.4.6 safeguard included the minor version. Starting at v1_4_R1.

See: http://forums.bukkit.org/threads/safeguard-versioning-policy.123435/
https://github.com/Bukkit/CraftBukkit/commit/fcfebeb7ade1e10dc03ce61d0ebc74c2319f2624