rpm: disable -Wno-override-init

rpm: disable -Wno-override-init

Fixed rpm-native.do_configure error on CentOS 5.x:
cc1: error: unrecognized command line option "-Wno-override-init"

The -Wno-override-init was commented in rpm-5.4.9, but commented out in
rpm-5.4.14 thus it is failed to build on CentOS 5.x, comment it again to fix
the problem.

(From OE-Core rev: ad4a54a0f5bb667f5d5e3df2bcf841b05e0d0f2c)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>