packaged-staging: basic support for pulling staging packages from a mirror
Add simple support for trying to fetch staging packages from a http, https or
ftp mirror if they do not already exist in PSTAGE_DIR.
As documented in local.conf.sample
"Poky can try and fetch packaged-staging packages from a http, https or ftp
mirror. Set this variable to the root of a pstage directory on a server."
If the PSTAGE_MIRROR variable is not set, or the package cannot be found on
the mirror it will be built as usual.
