ocamlbuild: update to 0.14.3.

Support bytecode-only.

srcpkgs/ocamlbuild/template

@@ -1,6 +1,6 @@
 # Template file for 'ocamlbuild'
 pkgname=ocamlbuild
-version=0.14.2
+version=0.14.3
 revision=1
 build_style=gnu-makefile
 hostmakedepends="ocaml"
@@ -9,7 +9,11 @@ maintainer="Leah Neukirchen <leah@vuxu.org>"
 license="LGPL-2.0-only"
 homepage="https://github.com/ocaml/ocamlbuild"
 distfiles="https://github.com/ocaml/${pkgname}/archive/${version}.tar.gz"
-checksum=62d2dab6037794c702a83ac584a7066d018cf1645370d1f3d5764c2b458791b1
+checksum=ce151bfd2141abc6ee0b3f25ba609e989ff564a48bf795d6fa7138a4db0fc2e1
 nocross=yes
 
 export CHECK_IF_PREINSTALLED=false
+
+pre_build() {
+	command -v ocamlc.opt >/dev/null || export OCAML_NATIVE=false
+}