iw: allow specifying CFLAGS/LIBS externally

If CFLAGS or LIBS are specified on the make command line,
then the += doesn't do anything. Add "override" directives
to still add the necessary libnl flags/libs.

Change-Id: Icdc3d14ae3a6f01b827c76e753c93fe8eb8fcec2
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1 file changed