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.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149799 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 505e1d1..a619293 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -2185,7 +2185,7 @@
 
     if (success) {
       // Get the fix string from the fixed format specifier
-      llvm::SmallString<128> buf;
+      SmallString<128> buf;
       llvm::raw_svector_ostream os(buf);
       fixedFS.toString(os);
 
@@ -2344,7 +2344,7 @@
 
     if (success) {
       // Get the fix string from the fixed format specifier.
-      llvm::SmallString<128> buf;
+      SmallString<128> buf;
       llvm::raw_svector_ostream os(buf);
       fixedFS.toString(os);
 
@@ -2675,7 +2675,7 @@
     return;
   }
 
-  llvm::SmallString<128> sizeString;
+  SmallString<128> sizeString;
   llvm::raw_svector_ostream OS(sizeString);
   OS << "sizeof(";
   DstArg->printPretty(OS, Context, 0, getPrintingPolicy());
@@ -2775,7 +2775,7 @@
     return;
   }
 
-  llvm::SmallString<128> sizeString;
+  SmallString<128> sizeString;
   llvm::raw_svector_ostream OS(sizeString);
   OS << "sizeof(";
   DstArg->printPretty(OS, Context, 0, getPrintingPolicy());