python-pytablewriter: add missing python-xlwt dependency

Since version 0.6.0 pytablewriter requires xlwt package too.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pytablewriter/Config.in

@@ -5,6 +5,7 @@ config BR2_PACKAGE_PYTHON_PYTABLEWRITER
 	select BR2_PACKAGE_PYTHON_PATHVALIDATE # runtime
 	select BR2_PACKAGE_PYTHON_SIX # runtime
 	select BR2_PACKAGE_PYTHON_XLSXWRITER # runtime
+	select BR2_PACKAGE_PYTHON_XLWT # runtime
 	help
 	  pytablewriter is a python library to write a table in various
 	  formats: CSV, HTML, JavaScript, JSON, Markdown, Excel, Pandas,