Rename CB/CBZ specific fixup accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121404 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp
index 0b4d042..ac39979 100644
--- a/lib/MC/ELFObjectWriter.cpp
+++ b/lib/MC/ELFObjectWriter.cpp
@@ -1556,7 +1556,7 @@
     case ARM::fixup_arm_pcrel_10:
     case ARM::fixup_arm_adr_pcrel_12:
     case ARM::fixup_arm_thumb_bl:
-    case ARM::fixup_arm_thumb_br:
+    case ARM::fixup_arm_thumb_cb:
     case ARM::fixup_arm_thumb_cp:
       assert(0 && "Unimplemented"); break;
     case ARM::fixup_arm_branch: