aapt: update for libpng 1.6.3

Summary:
This includes changes for libpng 1.6 in addition to the following:
Author: Chao Yang <chao.yang@linaro.org>
Date:   Mon Nov 14 14:19:18 2011 +0000

    aapt: update interfaces to libpng 1.5.7 beta 01

    Libpng 1.5.7 beta 01 is integrated, where some interfaces are
    changed and some structures are not visible to libpng clients
    any more. The structure information can be retrieved through
    specific interfaces.

    The call to png_set_filler() is removed as it can corrupt some png
    files. This function was used for libpng 1.2.4, but actually it did
    nothing in aapt.

    Remove a building warning in ZipFile.h.

Test Plan: finish and win

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D374