BaseTools: VPD Tool to allocate VPD region be aligned based on value type

BaseTools: VPD Tool to allocate VPD region be aligned based on value type

Base on build spec update, ASCII strings(“string”), will be byte aligned,
Unicode strings(L”string”) will be two-byte aligned, Byte arrays,
{0x00, 0x01} will be 8-byte aligned.
This patch is going to update VPD Tool to allocate VOID* PCDs to an offset
value that is aligned based in syntax of the PCD value.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19651 6f19259b-4bc3-4df7-8a09-765794883524