Rewrite makefiles to explicitly reference DESTDIR to fix bug 3153.

We need this so can not bake DESTDIR into the O'Caml symlinks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97743 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/tutorial/Makefile b/docs/tutorial/Makefile
index 6169bb8..9082ad4 100644
--- a/docs/tutorial/Makefile
+++ b/docs/tutorial/Makefile
@@ -12,7 +12,7 @@
 
 HTML       := $(wildcard $(PROJ_SRC_DIR)/*.html)
 EXTRA_DIST := $(HTML) index.html
-HTML_DIR   := $(PROJ_docsdir)/html/tutorial
+HTML_DIR   := $(DESTDIR)$(PROJ_docsdir)/html/tutorial
 
 install-local:: $(HTML)
 	$(Echo) Installing HTML Tutorial Documentation