racket: re-add documentation

closes #13437

srcpkgs/racket/template

@@ -1,7 +1,7 @@
 # Template file for 'racket'
 pkgname=racket
 version=6.12
-revision=2
+revision=3
 build_style=gnu-configure
 build_wrksrc=src
 hostmakedepends="gsfonts"
@@ -14,7 +14,6 @@ homepage="http://racket-lang.org/"
 distfiles="http://mirror.racket-lang.org/installers/$version/$pkgname-$version-src.tgz"
 checksum=655e052847c53e7c64ab9ad2247860c7b9abe2c4b0966474f0375127fff58c33
 nostrip=yes
-configure_args="--disable-docs"
 
 if [ "$CROSS_BUILD" ]; then
 	configure_args+=" --enable-racket=/usr/bin/racket"
@@ -38,3 +37,12 @@ pre_configure() {
 post_install() {
 	vlicense COPYING-libscheme.txt
 }
+
+racket-doc_package() {
+	noarch=yes
+	short_desc+=" -- documentation"
+	depends="racket>=${version}_${revision}"
+	pkg_install() {
+		vmove usr/share/doc/racket
+	}
+}