Move CharIsSigned from TargetInfo to LangOptions.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72928 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 1d2ddbd..e6dea7c 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -143,7 +143,7 @@
   // C99 6.2.5p2.
   InitBuiltinType(BoolTy,              BuiltinType::Bool);
   // C99 6.2.5p3.
-  if (Target.isCharSigned())
+  if (LangOpts.CharIsSigned)
     InitBuiltinType(CharTy,            BuiltinType::Char_S);
   else
     InitBuiltinType(CharTy,            BuiltinType::Char_U);