emit a 'maybe ftCall' in relocatable modules, to support optimizing inner-module function pointer calls

lib/Target/JSBackend/CallHandlers.h

diff --git a/lib/Target/JSBackend/CallHandlers.h b/lib/Target/JSBackend/CallHandlers.h
index 343ab54..9fc1d27 100644
--- a/lib/Target/JSBackend/CallHandlers.h
+++ b/lib/Target/JSBackend/CallHandlers.h
@@ -80,7 +80,7 @@
           Name = std::string("FUNCTION_TABLE_") + Sig + "[" + Name + " & #FM_" + Sig + "#]";
           NeedCasts = false; // function table call, so stays in asm module
         } else {
-          Name = std::string("ftCall_") + Sig + "(" + getCast(Name, Type::getInt32Ty(CI->getContext()));
+          Name = std::string(Relocatable ? "mftCall_" : "ftCall_") + Sig + "(" + getCast(Name, Type::getInt32Ty(CI->getContext()));
           if (NumArgs > 0) Name += ',';
           Emulated = true;
         }