[analyzer] Refactoring: Move stuff into namespace 'GR'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/GR/ExplodedGraph.cpp b/lib/GR/ExplodedGraph.cpp
index 6890ebf..fc46813 100644
--- a/lib/GR/ExplodedGraph.cpp
+++ b/lib/GR/ExplodedGraph.cpp
@@ -21,6 +21,7 @@
 #include <vector>
 
 using namespace clang;
+using namespace GR;
 
 //===----------------------------------------------------------------------===//
 // Node auditing.