Fetch libexif 0.6.21 to include the security fixes.

BUG=none
TEST=none
Review URL: https://chromiumcodereview.appspot.com/10792004

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/libexif/sources@146817 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
11 files changed
tree: 94ca236f1c86f5ac26e7f031c149ee2a80473e77
  1. AUTHORS
  2. COPYING
  3. README
  4. config.h
  5. libexif/
  6. test/