valadoc: Explicitly pass --pkg libgvc
valadoc: Explicitly pass --pkg libgvc

... to deal with a race with valadoc@PACKAGE_SUFFIX@.deps generation

frida/vala,GNOME/vala,frida/vala,GNOME/vala,GNOME/vala,frida/vala,frida/vala,GNOME/vala,frida/vala