Bug 1391857 - fixing ctx flags for e10s stun addr gathering. r=drno

In the case of e10s, the ctx flags for default route only (and less
importantly in this case, proxy only) were not set on the ice ctx
when SetStunAddrs was called in PeerConnectionMedia.

MozReview-Commit-ID: CldUpJfaaH3

--HG--
extra : rebase_source : 6223722275d4741519890d4d2b8436b05ca43155

src/ice/ice_ctx.c

@@ -749,6 +749,10 @@ int nr_ice_set_local_addresses(nr_ice_ctx *ctx,
       addr_ct = force_addr_ct;
     }
 
+    r_log(LOG_ICE, LOG_DEBUG,
+          "ICE(%s): use only default local addresses: %s\n",
+          ctx->label,
+          (char*)(ctx->flags & NR_ICE_CTX_FLAGS_ONLY_DEFAULT_ADDRS?"yes":"no"));
     if ((!addr_ct) || (ctx->flags & NR_ICE_CTX_FLAGS_ONLY_DEFAULT_ADDRS)) {
       /* Get just the default IPv4 and IPv6 addrs */
       if(!nr_ice_get_default_local_address(ctx, NR_IPV4, local_addrs, addr_ct,