48 kHz extension to iSAC.

Test:
-manual test with voe_cmd_test.
-manual test with RTPEncode & NetEqRTPPlay.
-manual test with simpleKenny.
-Bit-exact test of iSAC-swb and iSAC-wb with head revision of trunk. The bit-exactness is confirmed on all files generated by running webrtc/modules/audio_coding/codecs/isac/main/test/QA/runiSACLongtest.txt
Review URL: https://webrtc-codereview.appspot.com/937025

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3226 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/neteq/packet_buffer.c

@@ -615,7 +615,8 @@ int WebRtcNetEQ_GetDefaultCodecSettings(const enum WebRtcNetEQDecoder *codecID,
             codecBytes = 960; /* 240ms @ 32kbps (60ms frames) */
             codecBuffers = 8;
         }
-        else if (codecID[i] == kDecoderISACswb)
+        else if ((codecID[i] == kDecoderISACswb) ||
+            (codecID[i] == kDecoderISACfb))
         {
             codecBytes = 1560; /* 240ms @ 52kbps (30ms frames) */
             codecBuffers = 8;