webkitgtk: fix CVE-2022-48503

The issue was addressed with improved bounds checks. This issue
is fixed in tvOS 15.6, watchOS 8.7, iOS 15.6 and iPadOS 15.6,
macOS Monterey 12.5, Safari 15.6. Processing web content may
lead to arbitrary code execution.

References:
https://nvd.nist.gov/vuln/detail/CVE-2022-48503
https://support.apple.com/en-us/HT213340
https://bugs.webkit.org/show_bug.cgi?id=241931



Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>