Basic: import SmallString<> into clang namespace

(I was going to fix the TODO about DenseMap too, but
that would break self-host right now. See PR11922.)

llvm-svn: 149799
diff --git a/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
index a8bfbcd..4efcee2 100644
--- a/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp
@@ -468,7 +468,7 @@
     if (!BT_BadFree)
       BT_BadFree.reset(new BuiltinBug("Bad free"));
     
-    llvm::SmallString<100> buf;
+    SmallString<100> buf;
     llvm::raw_svector_ostream os(buf);
     
     const MemRegion *MR = ArgVal.getAsRegion();