Merge pull request #1024 from jbj/command-line-injection-precision

C++: Set cpp/command-line-injection precision=low

Author: geoffw0

cpp/ql/src/Security/CWE/CWE-078/ExecTainted.ql

@@ -5,7 +5,7 @@
  *              to command injection.
  * @kind problem
  * @problem.severity error
- * @precision high
+ * @precision low
  * @id cpp/command-line-injection
  * @tags security
  *       external/cwe/cwe-078