kernel: fixes for DEBUG_DUMPIPC mode

	. add dependency of headers on debug.d
	. put the generated headers in the right dir
	. also resilience against future ELAST duplicate errno

Change-Id: I9d10702c8e09699a40138193f14defe902399da6
remove unused hdemu release mode

Change-Id: I3ca497eda3c0042cafb8ba88fe16202221823a9c