Log Message:
Update to 48.0.1

* Remove dbus-glib dependency and add dbus option (from Robert Swindells)
* Fix potential build failure in skia (from Robert Swindells)

Changelog:
Fixed
    Fix an audio regression impacting some major websites (bug 1295296)
    Fix a top crash in the JavaScript engine (Bug 1290469)
    Fix a startup crash issue caused by Websense (Bug 1291738)
    Fix a different behavior with e10s / non-e10s on <select> and mouse \ 
events (Bug 1291078)
    Fix a top crash caused by plugin issues (Bug 1264530)
    Fix an unsigned add-ons issue on Windows
    Fix a shutdown issue (Bug 1276920)
    Fix a crash in WebRTC