Fix cpplint build/namespaces issues

Change-Id: I19c68703270c1482d6c6aad8cdf97d3d2924360a
diff --git a/compiler/llvm/runtime_support_builder.cc b/compiler/llvm/runtime_support_builder.cc
index 976aa8f..19ccc36 100644
--- a/compiler/llvm/runtime_support_builder.cc
+++ b/compiler/llvm/runtime_support_builder.cc
@@ -27,14 +27,14 @@
 #include <llvm/IR/Module.h>
 #include <llvm/IR/Type.h>
 
-using namespace llvm;
+using ::llvm::BasicBlock;
+using ::llvm::CallInst;
+using ::llvm::Function;
+using ::llvm::Value;
 
 namespace art {
 namespace llvm {
 
-using namespace runtime_support;
-
-
 RuntimeSupportBuilder::RuntimeSupportBuilder(::llvm::LLVMContext& context,
                                              ::llvm::Module& module,
                                              IRBuilder& irb)