package/python-mako: add optional runtime dependency on python-pygments

Some extensions of python-mako use python-pygments, if they are used,
python-pygments must be added as a runtime dependency.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit adb3f5a3e0d5bd6df60c91c46a03a2ff9c867dbb)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-mako/Config.in

@@ -7,3 +7,14 @@ config BR2_PACKAGE_PYTHON_MAKO
 	  for maximum performance.
 
 	  https://pypi.python.org/pypi/Mako
+
+if BR2_PACKAGE_PYTHON_MAKO
+
+config BR2_PACKAGE_PYTHON_MAKO_EXT_PYGMENTPLUGIN
+	bool "mako extension pygmentplugin"
+	select BR2_PACKAGE_PYTHON_PYGMENTS # runtime
+	help
+	  Provide python-pygments support for
+	  mako.ext.pygmentplugin
+
+endif