Makefile: Make test-el to test under private home dir

Makefile

@@ -377,10 +377,12 @@ test_els := test-el-emacs.el
 test-el: $(test_els)
 .PHONY: $(test_els)
 
-$(test_els): test-el-%: $(dotfiles_dir)/%
+$(test_els): test-el-%: $(dotfiles_dir)/% $(home)
 	$(emacs) -Q -batch -f batch-byte-compile $<
 	EMACS_EL_DRY_RUN=t $(emacs) -q --debug-init --batch \
-		--eval "(setq debug-on-error t)" --load $<c --kill
+		--eval "(setq debug-on-error t)" \
+		--eval "(setq user-emacs-directory \"$(home)/.emacs.d/\")" \
+		--load $<c --kill