Use the right target file name in mir-gen.c.
@@ -87,7 +87,7 @@ static void create_new_bb_insns (MIR_item_t func_item, MIR_insn_t before, MIR_in
static void gen_add_insn_before (MIR_item_t func_item, MIR_insn_t insn, MIR_insn_t before);
#ifdef __x86_64__
-#include "x86_64-target.c"
+#include "mir-gen-x86_64.c"
#else
#error "undefined or unsupported generation target"
#endif
