Remove more calls to dwarf2_per_objfile::adjust

As with the previous patch, this patch removes some calls to
dwarf2_per_objfile::adjust.  These calls are not needed by the cooked
indexer, as it does not create symbols or look up symbols by address.

The call in dwarf2_ranges_read is similarly not needed, as it is only
used to update an addrmap; and in any case I believe this particular
call is only reached by the indexer.