Migrate (i.e. move) `tools/bazel.rc` to `.bazelrc`

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

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

Change-Id: Ieef5cdb15219728c1fc4ca508b7dced74855b3f4
1 file changed