external/webp: update to v0.4.3

+ dropped some dated / unused files: INSTALL, examples/*

- 3/3/15: version 0.4.3
  This is a binary compatible release.
  * Android / gcc / iOS / MSVS build fixes and improvements
  * lossless decode fix (issue #239 -- since 0.4.0)
  * documentation / vwebp updates for animation
  * multi-threading fix (issue #234)

Change-Id: I7777e5d35f5659488a98fd773bd2a645ac06215d
55 files changed
tree: 48b5b5c2dc881c16a703c09de1287f398e357ed3
  1. Android.mk
  2. COPYING
  3. ChangeLog
  4. PATENTS
  5. README
  6. README.android
  7. include/
  8. src/