C++ Fix select statements of AV 3 and 81

Author: aibaars

cpp/ql/src/jsf/3.02 Code Size and Complexity/AV Rule 3.ql

@@ -12,5 +12,4 @@ import cpp
 from Function f, int c
 where c = f.getMetrics().getCyclomaticComplexity() and
       c > 20
-select f, c as CyclomaticComplexity,
-       "AV Rule 3: All functions shall have a cyclomatic complexity number of 20 or less."
+select f, "AV Rule 3: All functions shall have a cyclomatic complexity number of 20 or less."

cpp/ql/src/jsf/4.10 Classes/AV Rule 81.ql

@@ -3,6 +3,7 @@
  * @description The assignment operator shall handle self-assignment correctly.
  * @kind problem
  * @id cpp/jsf/av-rule-81
+ * @precision low
  * @problem.severity error
  * @tags correctness
  *       external/jsf
@@ -77,4 +78,4 @@ where hasResource(op.getDeclaringType())
       and not exists(op.getASelfEqualityTest())
       and not exists(op.getASwapCall())
       and exists(op.getADeleteExpr())
-select op
+select op, "AV Rule 81: The assignment operator shall handle self-assignment correctly."