Revise C++ coding style using clang-format

Run the `src/clang-format.bash` script to update all our C and C++
code to a new style defined by `.clang-format`.  Use `clang-format`
version 3.8.  Fix expected test output for new line numbers.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

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