BaseTools: Fix bug to not mix comment into Asbuilt inf Depex section

BaseTools: Fix bug to not mix comment into Asbuilt inf Depex section

in the generated Asbuilt inf would include the driver's complete
dependency expression, and it would be wrote as comment format. Original
bug is mix the depex expression with real comment in the depex section.
this patch is ignore the real comment, and list the depex expression.

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>