bump to r6 -> r33;
bump to r34;
bump to https://github.com/Cyan4973/xxHash/commit/f0f007f0424c12997a33d604c01664b30bb248f4;
bump to https://github.com/Cyan4973/xxHash/commit/7a0ba00df8d77f37f8119b7a1b25dba8ba635491;