Fix build without features.timezone

Change-Id: I3f8421103afa61baf415636b4dc8cf93fb477bcc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

src/corelib/tools/qdatetimeparser.cpp

@@ -44,7 +44,9 @@
 #include "qset.h"
 #include "qlocale.h"
 #include "qdatetime.h"
+#if QT_CONFIG(timezone)
 #include "qtimezone.h"
+#endif
 #include "qregexp.h"
 #include "qdebug.h"
 

src/plugins/sqldrivers/sqlite/qsql_sqlite.cpp

@@ -55,7 +55,9 @@
 #include <qcache.h>
 #include <qregularexpression.h>
 #endif
+#if QT_CONFIG(timezone)
 #include <QTimeZone>
+#endif
 #include <QScopedValueRollback>
 
 #if defined Q_OS_WIN
@@ -438,8 +440,10 @@ static QString timespecToString(const QDateTime &dateTime)
         return QStringLiteral("Z");
     case Qt::OffsetFromUTC:
         return secondsToOffset(dateTime.offsetFromUtc());
+#if QT_CONFIG(timezone)
     case Qt::TimeZone:
         return secondsToOffset(dateTime.timeZone().offsetFromUtc(dateTime));
+#endif
     default:
         return QString();
     }