[opus] Apply patch to fix another int-overflow in silk

Applies patch from https://gitlab.xiph.org/xiph/opus/-/commit/adcb7bc2

Bug: 1061593
Change-Id: I377991d493cfd1cf5bf509fee2deec6207feee56
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132634
Auto-Submit: Felicia Lim <flim@chromium.org>
Commit-Queue: James Zern <jzern@google.com>
Reviewed-by: James Zern <jzern@google.com>
Cr-Commit-Position: refs/heads/master@{#755511}

third_party/opus/README.chromium

@@ -16,6 +16,7 @@ Local changes:
 * set 'x' flags: "chmod 750 win32/genversion.bat"
 * remove assertion messages in release builds (see crbug/1053572)
 * apply patch to fix int-overflow in silk (https://gitlab.xiph.org/xiph/opus/-/commit/923bebde)
+* apply patch to fix another int-overflow in silk (https://gitlab.xiph.org/xiph/opus/-/commit/adcb7bc2)
 
 Opus' own unit tests are located in ./src/tests
 Additional chromium tests are located in ./tests

third_party/opus/src/silk/NSQ_del_dec.c

@@ -451,7 +451,7 @@ static OPUS_INLINE void silk_noise_shape_quantizer_del_dec(
 
             /* Input minus prediction plus noise feedback                       */
             /* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP  */
-            tmp1 = silk_ADD32( n_AR_Q14, n_LF_Q14 );                                    /* Q14 */
+            tmp1 = silk_ADD_SAT32( n_AR_Q14, n_LF_Q14 );                                /* Q14 */
             tmp2 = silk_ADD32( n_LTP_Q14, LPC_pred_Q14 );                               /* Q13 */
             tmp1 = silk_SUB_SAT32( tmp2, tmp1 );                                        /* Q13 */
             tmp1 = silk_RSHIFT_ROUND( tmp1, 4 );                                        /* Q10 */