This patch 1) enhance the help info for --pcd to use " but not '.
2) Add the condition statements for build option Pcd type check.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>