Improve CIL parsing

treble_sepolicy_tests gets very confused by parentheses in comments.

Fix the search for the opening parenthesis of a statement to skip
comments.

And then update a comment that was intended to use parentheses to
actually do so. (Without the parser change, this fails horribly.)

Test: Build
Change-Id: I1e36136e97dd9b8190add29b7f2155a08ea87d80

private/compat/202404/202404.cil

@@ -1,5 +1,5 @@
-;; This type may or may not already exist in vendor policy. Re-define it here - duplicate
-;; definitions in CIL will be ignored - so we can reference it in 202404.cil.
+;; This type may or may not already exist in vendor policy. Re-define it here (duplicate
+;; definitions in CIL will be ignored) - so we can reference it in 202404.cil.
 (type vendor_hidraw_device)
 (typeattributeset dev_type (vendor_hidraw_device))
 

tests/mini_parser.py

@@ -71,7 +71,13 @@ class MiniCilParser:
         s = ""
         c = infile.read(1)
         # get to first statement
-        while c and c != "(":
+        while c:
+            if c == ';':
+                # comment, get rid of rest of the line
+                while c != '\n':
+                    c = infile.read(1)
+            elif c == '(':
+                break
             c = infile.read(1)
 
         parens += 1