Update protobuf.cmake to b04e5cba356212e4e8c66c61bbe0c3a20537c5b9 (#13893)

This fix tries to address the issue raised in 8187 where
protobuf.cmake used different version as bazel.

The reason for discrepancy was due to the fact that a customerized
protobuf was needed with Windows patch. Since the patch has been
merged in (https://github.com/google/protobuf/pull/2203

),
it makes sense to update protobuf.cmake so that the same version
of cmake is used.

This fix fixes 8187.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>