Merge "Export headers for clang." am: 797e8a9e68 am: 0d295a5f50
am: ee95ec555d

* commit 'ee95ec555d056a3bbc7f06bf1b73712ba5726c68':
  Export headers for clang.

Change-Id: Ic73b5024e975f563d6661d858caca0cd30a739c8