[NFC][LLVM] Namespace cleanup in llc/lli.cpp (#162936)

Move file local function and variables out of anonymous namespace and
mark them static.

Author: jurahul

llvm/tools/llc/llc.cpp

@@ -218,13 +218,12 @@ static cl::opt<std::string> PassPipeline(
 static cl::alias PassPipeline2("p", cl::aliasopt(PassPipeline),
                                cl::desc("Alias for -passes"));
 
-namespace {
-
-std::vector<std::string> &getRunPassNames() {
+static std::vector<std::string> &getRunPassNames() {
   static std::vector<std::string> RunPassNames;
   return RunPassNames;
 }
 
+namespace {
 struct RunPassOption {
   void operator=(const std::string &Val) const {
     if (Val.empty())