correct the -isystem option to not add the -isysroot path.  Only the weird
-iwithsysroot flag should do that.  This fixes rdar://8345942


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111979 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index 55e3a42..1b6712f 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -912,7 +912,7 @@
   for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
     const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
     Init.AddPath(E.Path, E.Group, false, E.IsUserSupplied, E.IsFramework,
-                 false);
+                 !E.IsSysRootRelative);
   }
 
   // Add entries from CPATH and friends.