Revert 8406a2b981c5 to fix build bustage.
> Bug 1020695: Update Mozilla to use NSS 3.16.2 Beta 3. Includes fixes for
> bug 1013088, bug 996237, bug 970539, bug 1016567, bug 485732, bug 334013,
> bug 959864, bug 1016836, bug 1016811, bug 1018536, bug 996250, bug 1009227,
> bug 963150.