Bug 40933: Add tor-launcher functionality

browser/components/BrowserGlue.sys.mjs

browser/installer/package-manifest.in

toolkit/components/moz.build

toolkit/components/tor-launcher/TorBootstrapRequest.sys.mjs

toolkit/components/tor-launcher/TorControlPort.sys.mjs

toolkit/components/tor-launcher/TorLauncherUtil.sys.mjs

toolkit/components/tor-launcher/TorParsers.sys.mjs

toolkit/components/tor-launcher/TorProcess.sys.mjs

toolkit/components/tor-launcher/TorProvider.sys.mjs

toolkit/components/tor-launcher/TorProviderBuilder.sys.mjs

toolkit/components/tor-launcher/TorStartupService.sys.mjs

toolkit/components/tor-launcher/components.conf

toolkit/components/tor-launcher/moz.build

toolkit/components/tor-launcher/tor-launcher.manifest