with pch level 2 (base), a module still shouldn't pch its own headers

Change-Id: I9c7f7d2f266950fac683bf5148dec741d7652585
Reviewed-on: https://gerrit.libreoffice.org/72194
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

bin/update_pch

@@ -486,10 +486,15 @@ def sort_by_category(list, root, module, filter_local):
             sys.append(i)
         elif '<boost/' in i:
             boo.append(i)
-        elif '<osl/' in i or '<rtl/' in i or '<sal/' in i or '<vcl/' in i:
-            cor.append(i)
         elif prefix in i or not '/' in i:
             mod.append(i)
+        elif '<sal/' in i or '<vcl/' in i:
+            cor.append(i)
+        elif '<osl/' in i or '<rtl/' in i:
+            if module == "sal": # osl and rtl are also part of sal
+                mod.append(i)
+            else:
+                cor.append(i)
         # Headers from another module that is closely tied to the module.
         elif module == 'sc' and '<formula' in i:
             mod.append(i)