Rust: Extend while and for CFG tests

Author: hvitved

rust/ql/test/library-tests/controlflow/CONSISTENCY/CfgConsistency.expected

@@ -1,6 +1,6 @@
 deadEnd
 | test.rs:55:13:55:17 | b |
-| test.rs:224:28:224:33 | ... < ... |
-| test.rs:239:30:239:48 | BlockExpr |
+| test.rs:230:28:230:33 | ... < ... |
+| test.rs:245:30:245:48 | BlockExpr |
 scopeNoFirst
-| test.rs:62:5:66:5 | test_for |
+| test.rs:65:5:72:5 | test_for |