package/dhcpcd: fix build with nds32

Fix build failure with dhcpcd due to SECCOMP_AUDIT_ARCH which is used
since version 9.3.0 and
https://github.com/rsmarples/dhcpcd/commit/a926ee6d8f4eb2f04e01d72664893e3cb95fceca

Fixes:
 - http://autobuild.buildroot.org/results/af8ba07ea0c12ab8cd24d528ef98db05521f3d36



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>