Upgrade webkitgtk from 2.20.2 to 2.20.3.
* update context of 0001-WebKitMacros-Append-to-I-and-not-to-isystem.patch
* remove detect-atomics-during-configure.patch that webkitgtk 2.20.3
contains the commit of better solution, see
https://bugs.webkit.org/show_bug.cgi?id=161900#c9
Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>