[Patch] BaseTools: Fix one expression bug to support ~ operate

[Yonghong Zhu <yonghong.zhu@intel.com>]

current use (0x41>=~0x0&0x41|0x0) as Pcd value cause build failure
because the ~ is not correctly recognized.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
---
 BaseTools/Source/Python/Common/Expression.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 0091e47..78c69fa 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -786,11 +786,11 @@ class ValueExpression(BaseExpression):
             return ''
 
         OpToken = ''
         for Ch in Expr:
             if Ch in self.NonLetterOpLst:
-                if '!' == Ch and OpToken:
+                if Ch in ['!', '~'] and OpToken:
                     break
                 self._Idx += 1
                 OpToken += Ch
             else:
                 break
-- 
2.6.1.windows.1