Make dune build verbose

Index: ocamldeps/ppx_tools_versioned/Makefile
--- ocamldeps/ppx_tools_versioned/Makefile.orig
+++ ocamldeps/ppx_tools_versioned/Makefile
@@ -1,7 +1,7 @@
 INSTALL_ARGS := $(if $(PREFIX),--prefix $(PREFIX),)
 
 all:
-	dune build
+	dune build --verbose
 
 install:
 	dune install $(INSTALL_ARGS)