Swift: Placeholder query + docs for CWE-95.

Author: geoffw0

swift/ql/src/queries/Security/CWE-095/UnsafeWebViewFetch.qhelp

@@ -0,0 +1,32 @@
+<!DOCTYPE qhelp PUBLIC
+  "-//Semmle//qhelp//EN"
+  "qhelp.dtd">
+<qhelp>
+<overview>
+<p>TODO</p>
+
+</overview>
+<recommendation>
+
+<p>TODO</p>
+
+</recommendation>
+<example>
+
+<p>TODO</p>
+
+<sample src="StringLengthConflationBad.swift" />
+
+<p>TODO</p>
+
+<sample src="StringLengthConflationGood.swift" />
+
+</example>
+<references>
+
+<li>
+  <a href="TODO">TODO</a>
+</li>
+
+</references>
+</qhelp>

swift/ql/src/queries/Security/CWE-095/UnsafeWebViewFetch.ql

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+/**
+ * @name Unsafe WebView fetch
+ * @description TODO
+ * @kind problem
+ * @problem.severity warning
+ * @security-severity TODO
+ * @precision high
+ * @id swift/unsafe-webview-fetch
+ * @tags security
+ *       external/cwe/cwe-095
+ *       external/cwe/cwe-079
+ *       external/cwe/cwe-749
+ */
+
+import swift
+
+select "TODO"

swift/ql/src/queries/Security/CWE-095/UnsafeWebViewFetchBad.swift

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+
+TODO

swift/ql/src/queries/Security/CWE-095/UnsafeWebViewFetchGood.swift

@@ -0,0 +1,2 @@
+
+TODO