Squashed 'third_party/hpipm/' content from commit c2c0261

Change-Id: I05e186a6e1e1f075aa629092e7ad86e6116ca711
git-subtree-dir: third_party/hpipm
git-subtree-split: c2c0261e8ded36f636d9c4390a2899bdc4c999cc
84 files changed