Add grub-efi to packages

In theory, those packages should be included by live-build as d-i
dependencies but apparently those are missing. It should be enough
to just have those packages available in the "binary" part but installing
them in the live chroot doesn't hurt much either.

config/package-lists/kali.list.chroot

@@ -28,6 +28,16 @@ firmware-b43-installer
 guymager
 #endif
 
+# EFI support
+#if ARCHITECTURES i386
+grub-efi
+grub-efi-ia32
+#endif
+#if ARCHITECTURES amd64
+grub-efi
+grub-efi-amd64
+#endif
+
 # Graphical desktops depending on the architecture
 #
 # You can replace all the remaining lines with a list of the