Fix build settings of Pods.xcodeproj in case of use of legacy build output directory.

fix.rb

#!/usr/bin/env ruby

def build_option(option_name)
	output = `xcodebuild -showBuildSettings 2>/dev/null`.split("\n")
	output = output.select { |line| line[/#{option_name}/] }
	output.map { |line| line.split(' ')[2..-1].join(' ') }
end

require 'xcodeproj'

main_proj_root = build_option :SYMROOT

proj = Xcodeproj::Project.open('Pods/Pods.xcodeproj')

proj.targets.each do |target|
	target.build_configurations.each do |config|
		config.build_settings['SYMROOT'] = main_proj_root
    end
end

proj.save