Add r186216 back, but make the test tolerant of different uids and gids.

original message:
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@186238 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index ab2a2f1..5f47654 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() < 15) {
+  if (Name.size() < 16) {
     NewArchiveIterator NI(I, Twine(Name) + "/");
     Members.push_back(NI);
   } else {