package/pkg-utils.mk: include package directory in show-info output

The new package_dir element contains the path of the package
directory. For Buildroot packages this is a path relative to the main
Buildroot directory, for packages from external trees an absolute
path.

Signed-off-by: Fiona Klute (WIWA) <fiona.klute@gmx.de>
Tested-by: Titouan Christophe <titouan.christophe@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pkg-utils.mk

@@ -120,6 +120,7 @@ define _json-info-pkg
 		"virtual": false$(comma)
 		$(call _json-info-pkg-details,$(1)) \
 	)
+	"package_dir": $(call mk-json-str,$(patsubst $(CURDIR)/%,%,$($(1)_PKGDIR))),
 	"stamp_dir": $(call mk-json-str,$(patsubst $(CONFIG_DIR)/%,%,$($(1)_DIR))),
 	"source_dir": $(call mk-json-str,$(patsubst $(CONFIG_DIR)/%,%,$($(1)_DIR))),
 	"build_dir": $(call mk-json-str,$(patsubst $(CONFIG_DIR)/%,%,$($(1)_BUILDDIR))),