Rename static analyzer namespace 'GR' to 'ento'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122492 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/GR/Environment.cpp b/lib/GR/Environment.cpp
index 74ac7f2..4961704 100644
--- a/lib/GR/Environment.cpp
+++ b/lib/GR/Environment.cpp
@@ -16,7 +16,7 @@
 #include "clang/GR/PathSensitive/GRState.h"
 
 using namespace clang;
-using namespace GR;
+using namespace ento;
 
 SVal Environment::lookupExpr(const Stmt* E) const {
   const SVal* X = ExprBindings.lookup(E);