The links to targethosts-configlvm.html in overview-host-layout.rst
for both install-guide and install-guide-revised-draft would not work,
because the file/content now resides in targethosts-prepare.rst.
The links are fixed to reach the right page.
Change-Id: Ibd738a9af830bed0b2655aa1ea961e428308f7ad
closes-bug: #1614727