Revert commit r186216 -- it's breaking bots:

  http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/6897/steps/check-all/logs/LLVM%3A%3Aarchive-format.test

Original commit log:
  Fix a off by one error about which members need to use the string
  table.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186232 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index 5f47654..ab2a2f1 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -419,7 +419,7 @@
 template <typename T>
 void addMember(std::vector<NewArchiveIterator> &Members,
                std::string &StringTable, T I, StringRef Name) {
-  if (Name.size() < 16) {
+  if (Name.size() < 15) {
     NewArchiveIterator NI(I, Twine(Name) + "/");
     Members.push_back(NI);
   } else {