linux-ramdump-parser-v2: Add Func. to get debug_flags value

-page structures have a field for debug flags
-These flags are useful to determine if a page is poisoned
-get debug_flags value from page structure
-page is poisoned if value is 1

Change-Id: Ieeec9ca437b3ea5e20dc0c93150a60cd99e47535

linux-ramdump-parser-v2/mm.py

@@ -17,6 +17,11 @@ def page_buddy(ramdump, page):
     return val == 0xffffff80
 
 
+def get_debug_flags(ramdump, page):
+    debug_flag_offset = ramdump.field_offset('struct page', 'debug_flags')
+    flagval = ramdump.read_word(page + debug_flag_offset)
+    return flagval
+
 def page_zonenum(page_flags):
     # save this in a variable somewhere...
     return (page_flags >> 26) & 3