chromium: Fix build with nss 3.15

Meta-browser commit 4b7a82273a85802070441e9c510e0891acc482fa broke Chromium build because removal of meta-browser nss 3.13.3 forced build against OE-Core 3.15.1, which is not supported out of the box by Chromium 29.
This commit backports this patch:
https://src.chromium.org/viewvc/chrome/trunk/src/net/third_party/nss/ssl/bodge/secitem_array.c?r1=206184&r2=206183&pathrev=206184&diff_format=u

Upstream-Status: Backport of SVN REV 206184

Signed-off-by: Diego Rondini <diego.ml@zoho.com>
Signed-off-by: Eric Bénard <eric@eukrea.com>