Install files properly

It's not a good idea to install files/* to /etc/httpd/conf.d/ because
all elements get copied into one place, so this could copy unexpected files.

Instead copy files individually, from a fully-structured path in files/,
to minimise the chance of filename collisions.

This issue was observed during CI of
I95da168ee56ef05ea7a75db2135bebd642b13588.

Change-Id: Ib792afb2b011da9f18d4ef2a1deacbc5f9d57d11
Merge "Install files properly"