WEBRTC_{BIG, LITTLE}_ENDIAN -> WEBRTC_ARCH_{BIG, LITTLE}_ENDIAN.

Mostly to remove a long-standing TODO...

TESTED=trybots
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2369005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5013 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq/dtmf_buffer.c b/webrtc/modules/audio_coding/neteq/dtmf_buffer.c
index 9e32126..1788635 100644
--- a/webrtc/modules/audio_coding/neteq/dtmf_buffer.c
+++ b/webrtc/modules/audio_coding/neteq/dtmf_buffer.c
@@ -93,7 +93,7 @@
     if (len == 4)
     {
         EventStart = encoded;
-#ifdef WEBRTC_BIG_ENDIAN
+#ifdef WEBRTC_ARCH_BIG_ENDIAN
         value=((*EventStart)>>8);
         endEvent=((*EventStart)&0x80)>>7;
         Volume=((*EventStart)&0x3F);