libLTO: Add a utility method to initialize the disassemblers.

Necessary to give disassembler users (like darwin's otool) a possibility to
dlopen libLTO and still initialize the required LLVM bits. This used to go
through libMCDisassembler but that's a gross layering violation, the MC layer
can't pull in functions from the targets. Adding a function to libLTO is a bit
of a hack but not worse than exposing other disassembler bits from libLTO.

Fixes PR14362.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168545 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm-c/lto.h b/include/llvm-c/lto.h
index f43d365..74915c0 100644
--- a/include/llvm-c/lto.h
+++ b/include/llvm-c/lto.h
@@ -291,6 +291,13 @@
 extern void
 lto_codegen_debug_options(lto_code_gen_t cg, const char *);
 
+/**
+ * Initializes LLVM disassemblers.
+ * FIXME: This doesn't really belong here.
+ */
+extern void
+lto_initialize_disassembler(void);
+
 #ifdef __cplusplus
 }
 #endif