skia: 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.

Change-Id: I81846541be8b2d4d20b345c017602985c1d7dde6
skia: Use -fno-strict-aliasing for tests

Tests aren't compatible with strict aliasing rules, and aren't
speed relevant anyway -- use -fno-strict-aliasing

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
skia: Fix build in ISO C++11 mode

Fix macro constructs that could be mistaken for new string literals

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
skia: Use -fno-strict-aliasing for now

Change-Id: Iced75d8e419ffeee26e478b7716dfcf13e0f53d0
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
skia/bench: Use -fno-strict-aliasing

Use -fno-strict-aliasing for the benchmark so we don't have to use
it globally

Change-Id: Ibe5b80587818058cbb4290fe694c0b5d4cdc75a0
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
skia: Fix build in ISO C++ 11 mode

Change-Id: Ic1241cca1ec6eced270bff62da45e6c6b49e3ef2
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
skia: Add workaround for gcc 4.8 bug #54781

Change-Id: Ie201f6b1965c945ba9a14a69722dbb498516bec8
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>