[automerger skipped] libopus: Ignore integer overflows in NSQ_del_dec.c and NSQ.c am: 9435a97f8e -s ours

am skip reason: skipped by user essick

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libopus/+/14328001

Change-Id: Ibc0d1f794699fa7cad46bd57059c741f9a448632