Add rules_cc as bazel_dep

[phongt]

This fixed the error when using bazel build system for cxx as

https://github.com/dtolnay/cxx/blob/master/tools/bazel/rust_cxx_bridge.bzl#L3 using the rules_cc

ERROR: Skipping '//:cxx_helloworld': error loading package '': at /home/phongtran/.cache/bazel/_bazel_phongtran/2203687aa2e8f2dabc08191e61a17361/external/cxx.rs~/tools/bazel/rust_cxx_bridge.bzl:3:6: Unable to find package for @@[unknown repo 'rules_cc' requested from @@cxx.rs~]//cc:defs.bzl: The repository '@@[unknown repo 'rules_cc' requested from @@cxx.rs~]' could not be resolved: No repository visible as '@rules_cc' from repository '@@cxx.rs~'.
ERROR: error loading package '': at /home/phongtran/.cache/bazel/_bazel_phongtran/2203687aa2e8f2dabc08191e61a17361/external/cxx.rs~/tools/bazel/rust_cxx_bridge.bzl:3:6: Unable to find package for @@[unknown repo 'rules_cc' requested from @@cxx.rs~]//cc:defs.bzl: The repository '@@[unknown repo 'rules_cc' requested from @@cxx.rs~]' could not be resolved: No repository visible as '@rules_cc' from repository '@@cxx.rs~'.
INFO: Elapsed time: 2.428s
INFO: 0 processes.
ERROR: Build did NOT complete successfully
ERROR: Build failed. Not running target

[dtolnay]

Thanks!