Swift: Hide locationless results in the inlineexpectations test (there's no way to make them expected).

swift/ql/test/query-tests/Security/CWE-022/PathInjectionTest.expected

@@ -1 +0,0 @@
-| file://:0:0:0:0 | self | Unexpected result: hasPathInjection=208 |

swift/ql/test/query-tests/Security/CWE-022/PathInjectionTest.ql

@@ -19,6 +19,7 @@ class PathInjectionTest extends InlineExpectationsTest {
       location = sinkExpr.getLocation() and
       element = sinkExpr.toString() and
       tag = "hasPathInjection" and
+      location.getFile().getName() != "" and
       value = source.asExpr().getLocation().getStartLine().toString()
     )
   }