File ocaml-cppo-1.6.1-install-args.patch of Package ocaml-cppo

diff -up ocaml-cppo-1.6.1/Makefile.orig ocaml-cppo-1.6.1/Makefile
--- ocaml-cppo-1.6.1/Makefile.orig	2018-01-31 23:28:37.944255913 +0100
+++ ocaml-cppo-1.6.1/Makefile	2018-01-31 23:28:49.284256383 +0100
@@ -5,7 +5,7 @@ test:
 	@jbuilder runtest
 
 install:
-	@jbuilder install
+	@jbuilder install $(INSTALL_ARGS)
 
 uninstall:
 	@jbuilder uninstall