Make TemplateArgumentListBuilder take an ASTContext (because we're probably going to need it later). Move push_back to the .cpp file. If the passed in template argument is a type, assert that it's canonical.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72918 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateDeduction.cpp b/lib/Sema/SemaTemplateDeduction.cpp
index 59793fe..812b319 100644
--- a/lib/Sema/SemaTemplateDeduction.cpp
+++ b/lib/Sema/SemaTemplateDeduction.cpp
@@ -386,7 +386,7 @@
   
   // FIXME: This is terrible. DeduceTemplateArguments should use a 
   // TemplateArgumentListBuilder directly.
-  TemplateArgumentListBuilder Builder;
+  TemplateArgumentListBuilder Builder(Context);
   for (unsigned I = 0, N = Deduced.size(); I != N; ++I)
     Builder.push_back(Deduced[I]);