build: collapse all Makefile.am files into a single non-recursive one.

With this change, the whole of the build is done non-recursively in the
top-level Makefile.am. This reduces the amount of overhead due to recursing
into directories only to build one file.

Signed-off-by: Diego Elio Pettenò <flameeyes@gmail.com>
Signed-off-by: Christoph Brill <egore911@egore911.de>
11 files changed