Remove namespace qualifier that lead to build breakage.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170759 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/OperatorPrecedence.cpp

@@ -15,8 +15,8 @@
 
 namespace clang {
 
-prec::Level clang::getBinOpPrecedence(
-    tok::TokenKind Kind, bool GreaterThanIsOperator, bool CPlusPlus0x) {
+prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator,
+                               bool CPlusPlus0x) {
   switch (Kind) {
   case tok::greater:
     // C++ [temp.names]p3: