Change file permissions for .xinitrc to 744

The .xinitrc gets executed, so it must get the correct bit when
installing.

Makefile

@@ -7,3 +7,5 @@ objects=.bash_profile .beetsconfig .conky_box.lua .conkyrc .gitconfig \
 	.xinitrc .Xmodmap .xsession .zprofile .zshrc
 
 include dotfiles.mk
+
+install-.xinitrc: MODE=744

dotfiles.mk

@@ -1,5 +1,6 @@
 LOAD_PATH=. /usr/share/emacs/site-lisp $(HOME)/.emacs.d/site-lisp
 EMACS=emacs $(addprefix -L ,$(LOAD_PATH))
+MODE=644
 
 FG_YEL=\033[0;33m
 FG_GRE=\033[0;32m
@@ -32,7 +33,7 @@ $(modules): %:
 	@$(MAKE) -C $*
 
 $(install-objects): install-%: %
-	$(if $(call newer,$*),install -pDm 644 "$*" "$(DESTDIR)/$*")
+	$(if $(call newer,$*),install -pDm $(MODE) "$*" "$(DESTDIR)/$*")
 
 $(install-modules): install-%:
 	@$(MAKE) -C $* install