BaseTools: Enable Module Scope Structure Pcd

BaseTools: Enable Module Scope Structure Pcd

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2648

This patch is to enable the Module scoped Structure Pcd usage.
User can set structure pcd field value in module scope. For example,
under the [components] section of a dsc file, user can override some
field value for a specific module.

  Package/Module.inf{
      <PcdsFixedAtBuild>
      gUefiTokenSpaceGuid.StructurePcdModule.FieldName | 5
  }

Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Yuwei Chen <yuwei.chen@intel.com>
Tested-by: Liming Gao <gaoliming@byosoft.com.cn>
Acked-by: Liming Gao <gaoliming@byosoft.com.cn>