Factor GC metadata table assembly generation out of Collector in preparation for splitting AsmPrinter into its own library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54880 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Collectors.cpp b/lib/CodeGen/Collectors.cpp
index e063d47..3b0c554 100644
--- a/lib/CodeGen/Collectors.cpp
+++ b/lib/CodeGen/Collectors.cpp
@@ -19,3 +19,10 @@
 template<> CollectorRegistry::node *CollectorRegistry::Tail = 0;
 template<> CollectorRegistry::listener *CollectorRegistry::ListenerHead = 0;
 template<> CollectorRegistry::listener *CollectorRegistry::ListenerTail = 0;
+
+template<> GCMetadataPrinterRegistry::node *GCMetadataPrinterRegistry::Head = 0;
+template<> GCMetadataPrinterRegistry::node *GCMetadataPrinterRegistry::Tail = 0;
+template<> GCMetadataPrinterRegistry::listener *
+GCMetadataPrinterRegistry::ListenerHead = 0;
+template<> GCMetadataPrinterRegistry::listener *
+GCMetadataPrinterRegistry::ListenerTail = 0;