mk/target: fix typo so we depend on the correct directory

Without this, if we we're using a non-standard host libdir, the target
bindir would not exist (and rustc would fail to write to the
non-existent directory).

Author: codyps

mk/target.mk

@@ -116,7 +116,7 @@ $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
 		$$(foreach dep,$$(TOOL_DEPS_$(4)), \
 		    $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3)) \
-		| $$(TBIN$(1)_T_$(4)_H_$(3))/
+		| $$(TBIN$(1)_T_$(2)_H_$(3))/
 	@$$(call E, rustc: $$@)
 	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --cfg $(4)