libportal: enable vala

dev-libs/libportal/libportal-0.6.recipe

@@ -4,7 +4,7 @@ HOMEPAGE="https://people.freedesktop.org/~hughsient/appstream-glib/"
 COPYRIGHT="Matthias Clasen
 	Patrick Griffis"
 LICENSE="GNU LGPL v3"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/flatpak/libportal/releases/download/$portVersion/libportal-$portVersion.tar.xz"
 SOURCE_DIR="libportal-$portVersion"
 CHECKSUM_SHA256="88a12c3ba71bc31acff7238c280de697d609cebc50830c3766776ec35abc6566"
@@ -55,6 +55,7 @@ BUILD_PREREQUIRES="
 	cmd:ninja
 	cmd:perl
 	cmd:pkg_config$secondaryArchSuffix
+	cmd:valac
 	"
 
 BUILD()
@@ -71,7 +72,7 @@ BUILD()
 		-Dbackends=gtk3 \
 		-Dintrospection=true \
 		-Dportal-tests=false \
-		-Dvapi=false \
+		-Dvapi=true \
 		-Ddocs=false \
 		-Dtests=false \
 		_build