message: Update build paths in build_mozc_in_docker.md.
  Fix a wrong path (lib/mozc_renderer -> lib/mozc/mozc_renderer)
  Add paths for IBus component XML and icons.
diff: @@ -39,10 +39,13 @@ bazel build package --config oss_linux -c opt
  | ------------ | ------------ |
  | bazel-bin/server/mozc_server | /usr/lib/mozc/mozc_server |
  | bazel-bin/gui/tool/mozc_tool | /usr/lib/mozc/mozc_tool |
  -| bazel-bin/renderer/mozc_renderer | /usr/lib/mozc_renderer |
  +| bazel-bin/renderer/mozc_renderer | /usr/lib/mozc/mozc_renderer |
  | bazel-bin/unix/ibus/ibus_mozc | /usr/lib/ibus-mozc/ibus-engine-mozc |
  +| bazel-bin/unix/ibus/mozc.xml | /usr/share/ibus/component/mozc.xml |
  | bazel-bin/unix/emacs/mozc_emacs_helper | /usr/bin/mozc_emacs_helper |
  +Also, unzip bazel-bin/unix/icons.zip into /usr/share/ibus-mozc/.
  +
  ### Unittests
  ```
  