[llvm-xray] Use correct variable name

This fixes the compiler error introduced in r349129.

llvm-svn: 349130
diff --git a/llvm/lib/XRay/InstrumentationMap.cpp b/llvm/lib/XRay/InstrumentationMap.cpp
index e90446c..336a54a 100644
--- a/llvm/lib/XRay/InstrumentationMap.cpp
+++ b/llvm/lib/XRay/InstrumentationMap.cpp
@@ -137,9 +137,9 @@
     Sleds.push_back({});
     auto &Entry = Sleds.back();
     uint32_t OffsetPtr = 0;
-    uint32_t AddrPtr = OffsetPtr;
+    uint32_t AddrOff = OffsetPtr;
     Entry.Address = RelocateOrElse(AddrOff, Extractor.getU64(&OffsetPtr));
-    uint32_t FuncPtr = OffsetPtr;
+    uint32_t FuncOff = OffsetPtr;
     Entry.Function = RelocateOrElse(FuncOff, Extractor.getU64(&OffsetPtr));
     auto Kind = Extractor.getU8(&OffsetPtr);
     static constexpr SledEntry::FunctionKinds Kinds[] = {