Migrate `tools/bazel.rc` to `.bazelrc`

Since [1], Bazel changed the list of resource file locations.
Adapt to that list and move `%workspace%/tools/bazelrc` to
`%workspace%/.bazelrc`.

[1] https://github.com/bazelbuild/bazel/commit/ec83598

Change-Id: Ife3dd4f284e537ef00c2afa67e63aea316b5d548
1 file changed