Previously, the iproute2's configure script is actually run in the
do_compile stage. There's a Makefile rule 'all: Config' which makes
the configure process run to generate the Config file.
However, this makes it hard to fix the dependency problems. We need
to generate the Config file in the do_configure stage.
Add do_configure_append to separate the configure process from the
compile process.
Besides, explicitly disable ATM support for iproute2, otherwise we'll
sometimes meet errors like below when building.
ld: cannot find -latm
collect2: error: ld returned 1 exit status
Makefile:154: recipe for target 'q_atm.so' failed
make[1]: *** [q_atm.so] Error 1
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
