branches: 1.1.4; 1.1.8;
Homogenize reachover build file structure with that of kyua-cli:

- Move the majority of the common build definitions to the top-level
Makefile.inc and ensure this gets included everywhere.
- Move the bconfig.h file to the top-level directory.
- Add a statically-generated defs.h file instead of creating one
during the build. Easier to understand and less chances for things
to go wrong.
- Make sure all files using ATF_VERSION have the right dependency to
trigger a rebuild when the value changes.
- Clean up stale -I flags.

This is all mostly for simplicity reasons and to reduce the cognitive
load required to understand the build of the atf and kyua-* packages.

I have tested this with both MKKYUA=no/yes and non-clean/clean builds
so hopefully I got the details right. But if not, let me know please.

Rebase to HEAD as of a few days ago.

file bconfig.h was added on branch tls-maxphys on 2014-08-19 23:45:52 +0000

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")

file bconfig.h was added on branch yamt-pagecache on 2014-05-22 15:40:11 +0000