Issue:
genfds-multi-thread create makefile before section file generation,
so it get alignment is zero from empty file. It is incorrect.
solution:
GenSec get section alignment from input file when the input alignment
is zero.
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>