CPP: Tag Magic*UseConstant queries.

Author: geoffw0

cpp/ql/src/Best Practices/Magic Constants/MagicNumbersUseConstant.ql

@@ -4,6 +4,8 @@
  * @kind problem
  * @id cpp/use-number-constant
  * @problem.severity recommendation
+ * @precision low
+ * @tags maintainability
  */
 import cpp
 import MagicConstants

cpp/ql/src/Best Practices/Magic Constants/MagicStringsUseConstant.ql

@@ -4,6 +4,8 @@
  * @kind problem
  * @id cpp/use-string-constant
  * @problem.severity recommendation
+ * @precision low
+ * @tags maintainability
  */
 import cpp
 import MagicConstants