usrsctp: Change dependency from //crypto to //third_party/boringssl

third_party/usrsctp/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 config("usrsctp_config") {
   include_dirs = [
     "usrsctplib/usrsctplib",
     "usrsctplib/usrsctplib/netinet",
   ]
 }
@@ skipping 120 matching lines @@
       # this way would is incompatible  with windows XP.
       "WINVER=0x0502",
       "_WIN32_WINNT=0x0502",
     ]
     configs -= [ "//build/config/win:winver" ]
   } else {
     defines += [ "NON_WINDOWS_DEFINE" ]
   }
 
   deps = [
-    "//crypto:platform",
+    "//third_party/boringssl",
   ]
 }