v5: introduce exception debug buffer

After:
   text	   data	    bss	    dec	    hex	filename
   4312	      0	      0	   4312	   10d8	apf_interpreter.arm.o
   text	   data	    bss	    dec	    hex	filename
   5587	      0	      0	   5587	   15d3	apf_interpreter.x86.o

Test: TreeHugger, manually
Signed-off-by: Maciej Żenczykowski <[email protected]>
Change-Id: Iec488d561a9d3cbb9886191541b23746ee4a08bf
3 files changed