- setup the makefiles to support "make" and "make install", which builds
the kpatch-build tools and installs everything in /usr/local.
- update kpatch-build to support new paths
- add "kpatch build" wrapper around kpatch-build
The end-to-end patching works. From object analysis to generation to
runtime patching. It's still missing the scripting piece that will only
take a patch and kernel source dir as input.