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Tries to reland 237638 after fixing compiler warnings from a more recent compiler used on arm.

This cl ports the nacl wrapper to the chromium build system and adds local modifications from Chromevox to liblouis. The native library and braille tables are copied to the location in the resources output directory where chromevox can pick them up.

BUG=316353

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=237638

Review URL: https://codereview.chromium.org/67283007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238548 0039d316-1c4b-4281-b951-d872f2087c98