[OE-core] [PATCH] populate_sdk_ipk.bbclass: Ensure the correct environment is setup for postinstalls

[Richard Purdie]

Without this, various postinstalls get run with incorrect environments
leading to various failures when building the toolchains.

This adds some duplication and some variables we'd be better off
removing. It does unbreak the SDK ipk code for now though. This needs
revisiting.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
diff --git a/meta/classes/populate_sdk_ipk.bbclass b/meta/classes/populate_sdk_ipk.bbclass
index 8a0c268..c256c69 100644
--- a/meta/classes/populate_sdk_ipk.bbclass
+++ b/meta/classes/populate_sdk_ipk.bbclass
@@ -20,6 +20,11 @@ populate_sdk_ipk() {
 	export INSTALL_CONF_IPK="${IPKGCONF_TARGET}"
 	export INSTALL_PACKAGES_IPK="${TOOLCHAIN_TARGET_TASK}"
 
+	export D=${INSTALL_ROOTFS_IPK}
+	export OFFLINE_ROOT=${INSTALL_ROOTFS_IPK}
+	export IPKG_OFFLINE_ROOT=${INSTALL_ROOTFS_IPK}
+	export OPKG_OFFLINE_ROOT=${IPKG_OFFLINE_ROOT}
+
 	package_install_internal_ipk
 
 	#install host