Commit d264b6e81e forgot to drop
valijson_INSTALL_HEADERS option which has been removed with
c7d5f2cbec
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit a1dce92c72)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>