[ms-inline asm] Mark getClobber() const.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161912 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index fc0c081..05d0549 100644
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -1660,7 +1660,7 @@
   //===--- Other ---===//
 
   unsigned getNumClobbers() const { return NumClobbers; }
-  StringRef getClobber(unsigned i) { return Clobbers[i]; }
+  StringRef getClobber(unsigned i) const { return Clobbers[i]; }
 
   SourceRange getSourceRange() const LLVM_READONLY {
     return SourceRange(AsmLoc, EndLoc);