1. Fixed the error of get incorrect pcd value of DynamicHii type.
2. Fix build.exe '-x skuid' option error
3. Fixed the data with 2 bytes alignment in the stringtable of External PCD Database
4. Fixed the issue that Patchable Pcd does not list in AsBuildInf file

Signed-off-by: Feng, Bob C <bob.c.feng@intel.com>
Reviewed-by: Liu, Yingke D <yingke.d.liu@intel.com> 
Reviewed-by: Chen, Hesheng hesheng.chen@intel.com

git-svn-id: https://svn.code.sf.net/p/edk2-buildtools/code/trunk/BaseTools@2623 c2973edb-eda0-4c78-bc6a-9341b269661f