Prefix HAVE_SCTP macro with WEBRTC_.

Generated automatically with:

  git grep -l "\bHAVE_SCTP\b" | xargs \
    sed -i '' 's/HAVE_SCTP/WEBRTC_HAVE_SCTP/g'

Bug: webrtc:11142
Change-Id: I30e16a40ca7a7e388940191df22b705265b42cb4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/202251
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33042}

pc/peer_connection_bundle_unittest.cc

@@ -755,7 +755,7 @@ TEST_P(PeerConnectionBundleTest, RejectDescriptionChangingBundleTag) {
 // (https://bugs.chromium.org/p/chromium/issues/detail?id=827917)
 TEST_P(PeerConnectionBundleTest, RemovingContentAndRejectBundleGroup) {
   RTCConfiguration config;
-#ifndef HAVE_SCTP
+#ifndef WEBRTC_HAVE_SCTP
   config.enable_rtp_data_channel = true;
 #endif
   config.bundle_policy = BundlePolicy::kBundlePolicyMaxBundle;