Makefiles: make rustpkgtest depend on rustpkg executable

Author: catamorphism

mk/tests.mk

@@ -349,6 +349,7 @@ $(3)/stage$(1)/test/rustpkgtest-$(2)$$(X_$(2)):					\
 		$$(SREQ$(1)_T_$(2)_H_$(3)) \
 		$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_LIBSYNTAX_$(2)) \
 		$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_LIBRUSTC_$(2))
+		$$(TBIN$(1)_T_$(2)_H_$(3))/rustpkg$$(X_$(2))
 	@$$(call E, compile_and_link: $$@)
 	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --test