BaseTools: Report error for incorrect hex value format
BaseTools: Report error for incorrect hex value format

The case is user use 0x1} as a hex value for Pcd, it directly cause
tool report traceback info. This patch add more error info.

Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Cc: Yonghong Zhu <78d981fe33a016071af5222c56d5cf77f30fb0b2@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <fdd95dd62d41cb6d1628623e2b008c48ac56856d@intel.com>
Reviewed-by: Yonghong Zhu <78d981fe33a016071af5222c56d5cf77f30fb0b2@intel.com>

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