libgusb: add PACKAGECONFIG for vapi and keep it enabled only when int…

…rospection is

* vapi depends on introspection being enabled and libgusb build was failing
  without introspection with:
  | ../git/gusb/meson.build:182:6: ERROR: Unknown variable "libgusb_girtarget".

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/libgusb/libgusb_0.3.8.bb

@@ -6,6 +6,9 @@ DEPENDS = "glib-2.0 libusb"
 
 inherit meson gobject-introspection gtk-doc gettext vala
 
+PACKAGECONFIG ??= "${@bb.utils.contains('GI_DATA_ENABLED', 'True', 'vapi', '', d)}"
+PACKAGECONFIG[vapi] = "-Dvapi=true,-Dvapi=false"
+
 SRC_URI = "git://github.com/hughsie/libgusb.git;branch=main;protocol=https"
 SRCREV = "db9edbd8b45662d551194a0985173732f8f557a5"
 S = "${WORKDIR}/git"