Fix build breakage from r329201

Some compilers do not like having an enum type and a variable with the
same name (AccelTableKind). I rename the variable to TheAccelTableKind.

Suggestions for a better name welcome.

llvm-svn: 329202
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 76a360d..e4adaa1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -306,11 +306,11 @@
   // supported.
   if (AccelTables == AccelTableKind::Default) {
     if (tuneForLLDB() && A->TM.getTargetTriple().isOSBinFormatMachO())
-      AccelTableKind = AccelTableKind::Apple;
+      TheAccelTableKind = AccelTableKind::Apple;
     else
-      AccelTableKind = AccelTableKind::None;
+      TheAccelTableKind = AccelTableKind::None;
   } else
-    AccelTableKind = AccelTables;
+    TheAccelTableKind = AccelTables;
 
   UseInlineStrings = DwarfInlinedStrings == Enable;
   HasAppleExtensionAttributes = tuneForLLDB();