BaseTools: Guid.xref contain information from FILE statements in FDF
BaseTools: Guid.xref contain information from FILE statements in FDF

Update Guid.xref to contain information from FILE statements in FDF
file.

Fixes: https://bugzilla.tianocore.org/show_bug.cgi?id=778
Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Cc: Dmitry Antipov <f90aecd168d5d7515afae055ad697b8d4f73cbb2@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <78d981fe33a016071af5222c56d5cf77f30fb0b2@intel.com>
Reviewed-by: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2