Update ethash Godep

Godeps/Godeps.json

.../_workspace/src/github.com/ethereum/ethash/CMakeLists.txt

Godeps/_workspace/src/github.com/ethereum/ethash/ethash.go

...ithub.com/ethereum/ethash/src/libethash-cl/CMakeLists.txt

...c/github.com/ethereum/ethash/src/libethash-cl/bin2h.cmake

...ce/src/github.com/ethereum/ethash/src/libethash-cl/cl.hpp

....com/ethereum/ethash/src/libethash-cl/ethash_cl_miner.cpp

...ub.com/ethereum/ethash/src/libethash-cl/ethash_cl_miner.h

...thereum/ethash/src/libethash-cl/ethash_cl_miner_kernel.cl

...ace/src/github.com/ethereum/ethash/src/libethash/endian.h

...e/src/github.com/ethereum/ethash/src/libethash/internal.c

...rkspace/src/github.com/ethereum/ethash/src/libethash/io.c

...rkspace/src/github.com/ethereum/ethash/src/libethash/io.h

...e/src/github.com/ethereum/ethash/src/libethash/io_posix.c

...e/src/github.com/ethereum/ethash/src/libethash/io_win32.c

..._workspace/src/github.com/ethereum/ethash/test/c/test.cpp