loplugin:unusedenumconstants in EEControlBits

(*) remove effectivly unused enum constants

(*) tweak the plugins heuristics some more to remove false+ in this enum

(*) twweak the python post-processing step to avoid a KeyError

Change-Id: I2943ec94c00f71dcd049f5c9ef33db259c005ba3
Reviewed-on: https://gerrit.libreoffice.org/63709
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

compilerplugins/clang/unusedenumconstants.py

@@ -205,6 +205,9 @@ writeonlySet = set()
 for d in writeSet:
     if d in readSet:
         continue
+    # can happen with stuff in workdir or external
+    if d not in definitionSet:
+        continue
     srcLoc = definitionToSourceLocationMap[d];
     if (is_ignore(srcLoc)):
         continue
@@ -214,6 +217,9 @@ readonlySet = set()
 for d in readSet:
     if d in writeSet:
         continue
+    # can happen with stuff in workdir or external
+    if d not in definitionSet:
+        continue
     srcLoc = definitionToSourceLocationMap[d];
     if (is_ignore(srcLoc)):
         continue