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/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 7b9772d..8247b0b 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -434,7 +434,7 @@
   // are stored in the numeric constant. We utilize a quirk of the
   // lexer, which is that it handles something like 1.2.3 as a single
   // numeric constant, rather than two separate tokens.
-  llvm::SmallString<512> Buffer;
+  SmallString<512> Buffer;
   Buffer.resize(Tok.getLength()+1);
   const char *ThisTokBegin = &Buffer[0];
 
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index e1a1150..c1ebf91 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -266,7 +266,7 @@
 ///
 Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, unsigned Context) {
   assert(Tok.is(tok::string_literal) && "Not a string literal!");
-  llvm::SmallString<8> LangBuffer;
+  SmallString<8> LangBuffer;
   bool Invalid = false;
   StringRef Lang = PP.getSpelling(Tok, LangBuffer, &Invalid);
   if (Invalid)
diff --git a/lib/Parse/ParseInit.cpp b/lib/Parse/ParseInit.cpp
index ba7a024..39049d1 100644
--- a/lib/Parse/ParseInit.cpp
+++ b/lib/Parse/ParseInit.cpp
@@ -81,7 +81,7 @@
   if (Tok.is(tok::identifier)) {
     const IdentifierInfo *FieldName = Tok.getIdentifierInfo();
 
-    llvm::SmallString<256> NewSyntax;
+    SmallString<256> NewSyntax;
     llvm::raw_svector_ostream(NewSyntax) << '.' << FieldName->getName()
                                          << " = ";