Add support for pluggable components of static analyzer.
 - Creator function pointers are saved in ManagerRegistry.
 - The Register* class is used to notify ManagerRegistry new module is 
   available.
 - AnalysisManager queries ManagerRegistry for configurable module. Then it
   passes them to GRExprEngine, in turn to GRStateManager.

llvm-svn: 60143
diff --git a/clang/lib/Driver/ManagerRegistry.cpp b/clang/lib/Driver/ManagerRegistry.cpp
new file mode 100644
index 0000000..7604d28
--- /dev/null
+++ b/clang/lib/Driver/ManagerRegistry.cpp
@@ -0,0 +1,7 @@
+#include "clang/Driver/ManagerRegistry.h"
+
+using namespace clang;
+
+StoreManagerCreator ManagerRegistry::StoreMgrCreator = 0;
+
+ConstraintManagerCreator ManagerRegistry::ConstraintMgrCreator = 0;