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/Checker.cpp b/lib/GR/Checker.cpp
index 521d9e2..975d847 100644
--- a/lib/GR/Checker.cpp
+++ b/lib/GR/Checker.cpp
@@ -14,7 +14,7 @@
 
 #include "clang/GR/PathSensitive/Checker.h"
 using namespace clang;
-using namespace GR;
+using namespace ento;
 
 Checker::~Checker() {}