Add missing comma to GN build file.

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 for us and everybody else depending on openssl.
 config("openssl_config") {
   include_dirs = []
   if (cpu_arch == "x64") {
     # Ensure the 64-bit opensslconf.h header is used in preference to the one
     # in openssl/include.
     include_dirs += [ "config/x64" ]
   }
 
   include_dirs += [ "openssl/include" ]
 }
 
 # Config internal to this build file.
 config("openssl_internal_config") {
   visibility = ":*"  # Only targets in this file can depend on this.
 }
 
 # The list of OpenSSL files is kept in openssl.gypi. Read it.
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
-    [ rebase_path("//third_party/openssl/openssl.gypi") ]
+    [ rebase_path("//third_party/openssl/openssl.gypi") ],
     "scope",
     [ "//third_party/openssl/openssl.gypi" ])
 
 component("openssl") {
   sources = gypi_values.openssl_common_sources
 
   defines = gypi_values.openssl_common_defines
   defines += [
     "PURIFY",
     "MONOLITH",
@@ skipping 48 matching lines @@
       # OpenSSL uses several function-style macros and then ignores the
       # returned value.
       "-Wno-unused-value",
     ]
   } else {
     cflags += [
       "-Wno-unused-variable",
     ]
   }
 }