BaseTools: Fix bug caused by 03c36c36a3
BaseTools: Fix bug caused by 03c36c36a3

In the expression for unicode string and general string compare, it
should check whether it startswith "L'" or 'L"', but not "L".

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