C++: Fix tests after extractor changes that improve using position accuracy

Author: jketema

cpp/ql/test/library-tests/usings/Usings1.expected

@@ -1,7 +1,7 @@
-| templates.cpp:9:5:9:14 | using c | UsingDeclarationEntry, enclosingElement:std |
-| usings.cpp:8:1:8:11 | using nf | UsingDeclarationEntry, enclosingElement:(global namespace) |
+| templates.cpp:9:14:9:14 | using c | UsingDeclarationEntry, enclosingElement:std |
+| usings.cpp:8:10:8:11 | using nf | UsingDeclarationEntry, enclosingElement:(global namespace) |
 | usings.cpp:9:1:9:17 | using namespace N | UsingDirectiveEntry, enclosingElement:(global namespace) |
-| usings.cpp:18:3:18:13 | using bf | UsingDeclarationEntry, enclosingElement:D |
-| usings.cpp:21:5:21:14 | using gf | UsingDeclarationEntry, enclosingElement:{ ... } |
-| usings.cpp:34:3:34:20 | using tbf | UsingDeclarationEntry, enclosingElement:TD |
-| usings.cpp:42:5:42:22 | using foo | UsingDeclarationEntry, enclosingElement:nsbar |
+| usings.cpp:18:12:18:13 | using bf | UsingDeclarationEntry, enclosingElement:D |
+| usings.cpp:21:13:21:14 | using gf | UsingDeclarationEntry, enclosingElement:{ ... } |
+| usings.cpp:34:18:34:20 | using tbf | UsingDeclarationEntry, enclosingElement:TD |
+| usings.cpp:42:20:42:22 | using foo | UsingDeclarationEntry, enclosingElement:nsbar |