ANGLE: Upgrade to version 1.2.30d6c255d238

The following patches have been changed:

0001-Fix-compilation-for-MSVC-2008-and-std-tuple.patch
  Removed because it is no longer possible to build ANGLE with MSVC2008

0002-Fix-compilation-of-ANGLE-with-mingw-tdm64-gcc-4.8.1.patch
  Removed because the minimum version of MinGW moved to 4.8.2

0005-Fix-build-when-SSE2-is-not-available.patch
  Removed because it was fixed upstream

0006-Fix-compilation-of-libGLESv2-with-older-MinGW-w64-he.patch
  Removed because older versions of MinGW are not supported

0007-Fix-ANGLE-build-with-Microsoft-Visual-Studio-14-CTP.patch
  Removed because it was fixed upstream

Task-number: QTBUG-41903
Change-Id: I976d30802f7f6fee725cf9a9f1325d5e82609835
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>