Use PrivateLinkage now that it is safe.

Now that llvm's codegen knows to use an 'l' prefix when needed, we can just
use PrivateLinkage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201624 91177308-0d34-0410-b5e6-96231b3b80d8

examples/ExceptionDemo/ExceptionDemo.cpp

@@ -915,7 +915,7 @@ void generateStringPrint(llvm::LLVMContext &context,
     new llvm::GlobalVariable(module,
                              stringConstant->getType(),
                              true,
-                             llvm::GlobalValue::LinkerPrivateLinkage,
+                             llvm::GlobalValue::PrivateLinkage,
                              stringConstant,
                              "");
   }
@@ -959,7 +959,7 @@ void generateIntegerPrint(llvm::LLVMContext &context,
     new llvm::GlobalVariable(module,
                              stringConstant->getType(),
                              true,
-                             llvm::GlobalValue::LinkerPrivateLinkage,
+                             llvm::GlobalValue::PrivateLinkage,
                              stringConstant,
                              "");
   }