8089a0f85d
1. use += to add to DEPS 2. move inclusion of rules mk. files before the rules are defined so that variables are set. Now we get on amd64: mkdep: ignoring acpi_wakeup_low.d: No such file or directory mkdep: ignoring amd64func.d: No such file or directory mkdep: ignoring busfunc.d: No such file or directory mkdep: ignoring copy.d: No such file or directory mkdep: ignoring cpu_in_cksum.d: No such file or directory mkdep: ignoring cpufunc.d: No such file or directory because there are no rules to generate those, but it is harmless.