post-install scripts may need to call executables installed to
STAGING_DIR_HOSTPKG which is not part of the PATH set to TARGET_PATH in
rules.mk.
Set PATH for post-install scripts to TARGET_PATH_PKG.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://github.com/openwrt/openwrt/pull/16865
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>