Extract third party part of g711 codec into separate target

Bug: webrtc:8366
Change-Id: I34c7ea707213e0c1a50826896da01f70c072eae5
Reviewed-on: https://webrtc-review.googlesource.com/84741
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23724}

modules/audio_coding/codecs/g711/g711.c

@@ -21,7 +21,6 @@
  */
 
 #include "modules/audio_coding/codecs/g711/g711.h"
-#include "typedefs.h"  // NOLINT(build/include)
 
 /* Copied from the CCITT G.711 specification */
 static const uint8_t ulaw_to_alaw_table[256] = {

modules/audio_coding/codecs/g711/g711.h

@@ -50,7 +50,7 @@ specification by other means.
 extern "C" {
 #endif
 
-#include "typedefs.h"  // NOLINT(build/include)
+#include <stdint.h>
 
 #if defined(__i386__)
 /*! \brief Find the bit position of the highest set bit in a word