Replace PropertyCustomizer with a more extensible hooks mechanism.
Instead of passing an object that satisifies an interface, pass a
function pointer that takes a context interface as an argument. Callers
can use lambdas to capture any other necessary parameters like property
structs.
Also add two new hooks, arch hooks that occur after splitting modules
into arch variants, and install hooks that occur each time a file is
installed to the output directory.
Change-Id: I3a3e34aa97f1a92d3a31e5004b4b1ba68869d242
