Add liveedit-debugger.js to the list of JS library files in the snapshot

This fixes a crash in the WebKit layout tests due to a failure in
Debug::ClearMirrorCache() when attempting to call the JS ClearMirrorCache()
function.

Bug: 2689013
Change-Id: I68acf34c2132a51491e974cb561280aa83ef6260
1 file changed