Move SettingsManager and PlatformBuilder classes to PlatformBuildLib.py
file, keep only CommonPlatform class in PlatformBuild.py. Allows
reusing these classes for other builds. Pure code motion, no functional
change.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>