This allows the build.sh script to be used to rebuild binaries based on
existing configuration in addition to the initial case of preparing
suitable build configuration.
Signed-hostap: Jouni Malinen <j@w1.fi>
This is easier than to copy/paste from the README. We may
want to extend it later to change the .config for some
common differences between systems (e.g., libnl/libbfd).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>