[aur-general] avoid usage of fakeroot: always use of build() and package() (Was: application as a TU)

[Phillip Smith]

> find ${pkgdir}/.../ -type d -exec chmod 755 {} \;
> find ${pkgdir}/.../ -type f -exec chmod 644 {} \;

chmod -R u=rwX,go=rX $pkgdir

The capital X will only set the execute bit on directories, and leave
it untouched on files if it is already set :)