Prebuild script may update os.environ, but the tooldef class not include
the new ENV variables. so after the Launch prebuild script, we should
re-init the tooldef class to include the new ENV variables.
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
a0c9ce31b6