increment build generate inf file in output directory lost .depex file info.
(re-add this patch since it be reverted in Python3 migration patches,
but this check is not related with Python3)
Fixes: https://bugzilla.tianocore.org/show_bug.cgi?id=1244
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: Liming Gao <liming.gao@intel.com>
04aa423c8d