Migrate content from wiki

doc/support/generate_doxygen.sh

 #!/bin/sh
 
 # Copyright 2015 The Crashpad Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
 set -e
 
 # Generating Doxygen documentation requires Doxygen, http://www.doxygen.org/.
 
 # Run from the Crashpad project root directory.
-cd "$(dirname "${0}")/.."
+cd "$(dirname "${0}")/../.."
 
 output_dir=out/doc/doxygen
 
 rm -rf "${output_dir}"
 mkdir -p "${output_dir}"
 
-doxygen doc/crashpad.doxy
+doxygen doc/support/crashpad.doxy