* Switch from /usr/local/poky to /opt/poky
* Use a sysroots directory for both the "native" sdk binaries and the target
* Drop the meta-toolchain extras packages. These are replaced with packaged-staging.
* Change the nativesdk layout to match our usual filesystem layout
* Clean up various hardcoded prefix references
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>