deps: update license-builder & LICENSE for c-ares

c-ares now includes a LICENSE file so we no longer need to pull from the
heading of a file.

PR-URL: nodejs/node#15378
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

LICENSE

@@ -53,20 +53,19 @@ The externally maintained libraries used by Node.js are:
 
 - c-ares, located at deps/cares, is licensed as follows:
   """
+    Copyright (c) 2007 - 2016, Daniel Stenberg with many contributors, see AUTHORS
+    file.
+
     Copyright 1998 by the Massachusetts Institute of Technology.
-    Copyright (C) 2007-2013 by Daniel Stenberg
-
-    Permission to use, copy, modify, and distribute this
-    software and its documentation for any purpose and without
-    fee is hereby granted, provided that the above copyright
-    notice appear in all copies and that both that copyright
-    notice and this permission notice appear in supporting
-    documentation, and that the name of M.I.T. not be used in
-    advertising or publicity pertaining to distribution of the
-    software without specific, written prior permission.
-    M.I.T. makes no representations about the suitability of
-    this software for any purpose.  It is provided "as is"
-    without express or implied warranty.
+
+    Permission to use, copy, modify, and distribute this software and its
+    documentation for any purpose and without fee is hereby granted, provided that
+    the above copyright notice appear in all copies and that both that copyright
+    notice and this permission notice appear in supporting documentation, and that
+    the name of M.I.T. not be used in advertising or publicity pertaining to
+    distribution of the software without specific, written prior permission.
+    M.I.T. makes no representations about the suitability of this software for any
+    purpose.  It is provided "as is" without express or implied warranty.
   """
 
 - HTTP Parser, located at deps/http_parser, is licensed as follows:

tools/license-builder.sh

@@ -29,8 +29,7 @@ fi
 
 
 # Dependencies bundled in distributions
-addlicense "c-ares" "deps/cares" \
-           "$(sed -e '/^ \*\/$/,$d' -e '/^$/d' -e 's/^[/ ]\* *//' ${rootdir}/deps/cares/src/ares_init.c)"
+addlicense "c-ares" "deps/cares" "$(tail -n +3 ${rootdir}/deps/cares/LICENSE.md)"
 addlicense "HTTP Parser" "deps/http_parser" "$(cat deps/http_parser/LICENSE-MIT)"
 if [ -f "${rootdir}/deps/icu/LICENSE" ]; then
   # ICU 57 and following. Drop the BOM