Add plumbing for the `linker_private' linkage type. This type is meant for
"private" symbols which the assember shouldn't strip, but which the linker may
remove after evaluation. This is mostly useful for Objective-C metadata.

This is plumbing, so we don't have a use of it yet. More to come, etc.

llvm-svn: 76385
diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index 71e71a9..5d4b091 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -141,6 +141,7 @@
   LLVMInternalLinkage,    /**< Rename collisions when linking (static
                                functions) */
   LLVMPrivateLinkage,     /**< Like Internal, but omit from symbol table */
+  LLVMLinkerPrivateLinkage, /**< Like Private, but linker removes. */
   LLVMDLLImportLinkage,   /**< Function to be imported from DLL */
   LLVMDLLExportLinkage,   /**< Function to be accessible from DLL */
   LLVMExternalWeakLinkage,/**< ExternalWeak linkage description */