Do not remove .git directory because it cause successive call to makepkg to
not work. Use .scmversion file instead.

- rely on kernel-install-hook package (no more call to kernel-install)
- run depmod inside the package to keep tracks of files
- fix patch application loop
- use pkgrel as kernel build version
- fix call to strip
- remove optdeps (they are in kernel-install-hook)

- regression on i915

- restore i686 compat

Since last update, module compilation was broken. Fix it by adding the old
manually copied headers from kernel compilation

- change package named to linux-$kernelrelease
- remove nice stuff
- use git as source

New install script is bugged when removing the package. It delete the whole
/usr/lib/modules, so this update is required to avoid big issue!

Info file is removed because it's no more needed