[BUG] clean target deletes lib/acpi/dsdt.c

Hello Simon,

The clean target deletes lib/acpi/dsdt.c. But without it building some x86 targets fails:

+Some images are invalid x86: + edison +make[3]: *** No rule to make target 'lib/acpi/dsdt.asl', needed by 'lib/acpi/dsdt.c'. Stop.

Should lib/acpi/dsdt.c be generated code? Or is the clean target wrong?

Maybe we should just rename lib/acpi/dsdt.c.

Best regards

Heinrich