QmlJS checks: Add warning about 'eval'.

Migrated from QtChecker.

Change-Id: I4b3e8993c7b9f697497d2199b24bf49379dbc1b4
Reviewed-on: http://codereview.qt-project.org/5860
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@nokia.com>

src/libs/qmljs/qmljscheck.cpp

@@ -1160,6 +1160,8 @@ bool Check::visit(CallExpression *ast)
     if (!name.isEmpty() && name.at(0).isUpper()) {
         addMessage(WarnExpectedNewWithUppercaseFunction, location);
     }
+    if (cast<IdentifierExpression *>(ast->base) && name == QLatin1String("eval"))
+        addMessage(WarnEval, location);
     return true;
 }