Merge pull request #128 from geoffw0/cwe-190-precision

CPP: Adjust precisions for the CWE-190 queries.

Author: jbj

cpp/ql/src/Security/CWE/CWE-190/ArithmeticTainted.ql

@@ -4,7 +4,7 @@
  *              not validated can cause overflows.
  * @kind problem
  * @problem.severity warning
- * @precision medium
+ * @precision low
  * @id cpp/tainted-arithmetic
  * @tags security
  *       external/cwe/cwe-190

cpp/ql/src/Security/CWE/CWE-190/IntegerOverflowTainted.ql

@@ -5,6 +5,7 @@
  * @kind problem
  * @id cpp/integer-overflow-tainted
  * @problem.severity warning
+ * @precision low
  * @tags security
  *       external/cwe/cwe-190
  *       external/cwe/cwe-197