webidl: Apply and update debug.patch, remove abstract.patch which was already upstream.

components/script/dom/bindings/codegen/parser/abstract.patch

@@ -1,12 +0,0 @@
---- WebIDL.py
-+++ WebIDL.py
-@@ -1416,7 +1416,8 @@
-                   identifier == "LegacyEventInit" or
-                   identifier == "ProbablyShortLivingObject" or
-                   identifier == "LegacyUnenumerableNamedProperties" or
--                  identifier == "NonOrdinaryGetPrototypeOf"):
-+                  identifier == "NonOrdinaryGetPrototypeOf" or
-+                  identifier == "Abstract"):
-                 # Known extended attributes that do not take values
-                 if not attr.noArguments():
-                     raise WebIDLError("[%s] must take no arguments" % identifier,