libxslt: point to the correct xml2-config location
Currently libxslt configure finds native /usr/bin/xml2-config.
Signed-off-by: Ferdinand van Aartsen <ferdinand@ombud.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit f8f8ff33472641f9192a5e1ca65ebc614821665a)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>