Repair a few more drake subdir paths in docs

[jwnimmer-tri]

Relates #6996.

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This change is 

[rpoyner-tri]

Review status: 0 of 12 files reviewed at latest revision, 1 unresolved discussion.

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doc/bazel.rst, line 92 at r1 (raw file):

  bazel test --config=kcov common:polynomial_test      # Run one test under kcov (see instructions below).
  bazel build -c dbg common:polynomial_test && \
    gdb ../bazel-bin/common/polynomial_test            # Run one test under gdb.

I think ./ is correct here now, rather than ../

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Comments from Reviewable

[rpoyner-tri]

Reviewed 12 of 12 files at r1.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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Comments from Reviewable

[jwnimmer-tri]

Review status: 11 of 12 files reviewed at latest revision, 1 unresolved discussion.

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doc/bazel.rst, line 92 at r1 (raw file):

Previously, rpoyner-tri (Rick Poyner (rico)) wrote…

I think ./ is correct here now, rather than ../

Done.

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Comments from Reviewable

[rpoyner-tri]

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Reviewed 1 of 1 files at r2.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[jwnimmer-tri]

+@sherm1 for platform review per schedule, please.

[sherm1]

I appreciate your ongoing efforts to make this change work, Jeremy. It also makes me a little sad since I think it was better (less brittle) before. But, since we're apparently going this way ... .

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Reviewed 11 of 12 files at r1, 1 of 1 files at r2.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable