coreutils: enable `hostname`

base/coreutils/coreutils.conf

@@ -50,3 +50,5 @@ var_append INSTALL_WRAPPER_FILTER "|" \
 
 hook_add postmake 5 'ln -sf install $root/usr/bin/ginstall'
 
+# install hostname
+var_append confopt ' ' '--enable-install-program=hostname'