[llvm-objdump] - Fix comment. NFC.

This was mentioned by James Henderson
in review for https://reviews.llvm.org/D57051.

llvm-svn: 352348
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 8241765..c84d8b6 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -1371,7 +1371,7 @@
               continue;
             }
 
-            // Stop when rel_cur's address is past the current instruction.
+            // Stop when RelCur's offset is past the current instruction.
             if (Offset >= Index + Size)
               break;