webkit: Fix build in ISO C++ 11 mode

Change-Id: I32b3121ae46678f847dcd74ea74484aaf8f34eaf
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
webkit: Fix ambiguous conversion errors for gcc 4.8

Change-Id: Ifa1a4073a805485a38344a7170ce381e6f0bbbd9
webkit: Update ANGLE library to use the external project

Using the external/angle has bug fix for webgl

Change-Id: I6b519b055d8fcbc30787bb3ea1f0dd4fbc3151cc
CRs-fixed: 427617
WebKit/ANGLE: Disable strict-aliasing for now

Change-Id: Id63f3e2004acdfdf7b3bcfa83cc454f56ec66591