When there are multi versions of VS installed on the Windows host
system, BuildLoader.py often set up old VS version for the toolchain
variable. Resolve it by changing the structure type of vs_ver_list.
Signed-off-by: Augustine Chen <augustine.chen@intel.com>
Update build tool to use Buildloader.py to build SBL
in both Linux and Windows.
Update tools to support multiple workspaces, so platform
packages could be in another place.
TEST=Build qemu and APL platform success.
Change-Id: I2482037ba605218c947b6de28abe8e3eeacdc17f
Signed-off-by: Guo, Dong <guo.dong@intel.com>