libseccomp: don't build on ARC

ARC architecture is not yet supported by libseccomp.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

libs/libseccomp/Makefile

@@ -56,6 +56,7 @@ endef
 define Package/libseccomp
 $(call Package/libseccomp/Default)
   TITLE+= (library)
+  DEPENDS+= @!arc
 endef
 
 define Package/scmp_sys_resolver