[ms-inline asm] Stmt destructors are never called, so allocate the AsmToks using
the ASTContext BumpPtr.  Also use the preferred llvm::ArrayRef interface.

llvm-svn: 161373
diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index 718a7e6..5df1a50 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -2748,7 +2748,7 @@
 }
 
 StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
-                                SmallVectorImpl<Token> &AsmToks,
+                                ArrayRef<Token> AsmToks,
                                 std::string &AsmString,
                                 SourceLocation EndLoc) {
   // MS-style inline assembly is not fully supported, so emit a warning.