BaseTools: Report error when GUID format is incorrect

Flexible GUID format of PCD value support following format, so tool should report
error when it is not correct.
1. { GUID("11E13869-1896-4A07-8B21-D8B23DD2A2B4") }
2. { GUID({ 0x11e13869, 0x1896, 0x4a07,{
    0x8b, 0x21, 0xd8, 0xb2, 0x3d, 0xd2, 0xa2, 0xb4 } }) }
3. { GUID(gEfiBlockIoProtocolGuid) }

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>