classes/buildhistory: split SDK data by IMAGE_NAME
Data from SDKs produced from different images or different
meta-toolchain style recipes should go into separate directories,
since SDK_NAME doesn't include anything to differentiate these by
default (only pieces for the distro name and architectures).
Note you should delete or move existing data under the buildhistory/sdk/
directory manually after this change.
Fixes [YOCTO #4622].
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Saul Wold <sgw@linux.intel.com>
