Install gcc to be able to use /lib/cpp - the preprocesser program

Author: dinosaure

opam/esperanto.opam

@@ -13,6 +13,7 @@ build: [
 install: ["sh" "-c" "cd caml ; %{make}% install" ]
 depends: [
   "conf-which" {build}
+  "conf-gcc" {build}
   "ocaml-src" {build}
   "esperanto-cosmopolitan" {build}
 #  "cosmopolitan-pth" {build}