pixman: add explicit dependencies for host variant

Signed-off-by: Julien Floret <julien.floret@6wind.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pixman/pixman.mk

@@ -12,6 +12,7 @@ PIXMAN_LICENSE_FILES = COPYING
 
 PIXMAN_INSTALL_STAGING = YES
 PIXMAN_DEPENDENCIES = host-pkgconf
+HOST_PIXMAN_DEPENDENCIES = host-pkgconf
 
 # For 0001-Disable-tests.patch
 PIXMAN_AUTORECONF = YES