Upgrade our copies of clang, llvm, lldb, compiler-rt and libc++ to 3.7.0

release.

Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11
support to build; see UPDATING for more information.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.7.0/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.7.0/tools/clang/docs/ReleaseNotes.html>

Thanks to Ed Maste, Andrew Turner and Antoine Brodin for their help.

Exp-run:	antoine
Relnotes:	yes

1 files changed, 1 insertions, 1 deletions

diff --git a/contrib/libc++/src/debug.cpp b/contrib/libc++/src/debug.cpp
index 60694a3..b1a16e6 100644
--- a/contrib/libc++/src/debug.cpp
+++ b/contrib/libc++/src/debug.cpp
@@ -214,10 +214,10 @@ __libcpp_db::__erase_i(void* __i)
             else
                 q->__next_ = p->__next_;
             __c_node* c = p->__c_;
-            free(p);
             --__isz_;
             if (c != nullptr)
                 c->__remove(p);
+            free(p);
         }
     }
 }