[PATCH] Fix std::variant for gnu-versioned--namespace build

[Jonathan Wakely]

        * include/std/variant: Remove misplaced
        _GLIBCXX_BEGIN_NAMESPACE_VERSION macro.

Committed to trunk.

commit b110aaffa944b6dda77569fb9b18950993d4e25a
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Fri Dec 9 15:20:48 2016 +0000

    Fix std::variant for gnu-versioned--namespace build
    
        * include/std/variant: Remove misplaced
        _GLIBCXX_BEGIN_NAMESPACE_VERSION macro.

diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index 822674f..899198a 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -46,7 +46,6 @@
 
 namespace std _GLIBCXX_VISIBILITY(default)
 {
-_GLIBCXX_BEGIN_NAMESPACE_VERSION
 namespace __detail
 {
 namespace __variant