die() needs to be defined in post-update hook

(and in one other place it needs to be defined earlier)

I never caught this because in my testing those error conditions --
caused by lack of afc3a06 -- never came up.

contrib/adc/adc.common-functions

@@ -23,6 +23,8 @@ GL_FORKED_FROM="gl-forked-from"
 
 # ------------------------------------------------------------------------------
 
+die() { echo "$@"; exit 1; }
+
 # test an option value more concisely
 opt() {
     [ "$1" = "1" ] && return 0
@@ -39,8 +41,6 @@ valid_owned_repo() {
     cd $GL_REPO_BASE_ABS
 }
 
-die() { echo "$@"; exit 1; }
-
 # NOTE: this also sets $repo to the normalised (without .git suffix) reponame
 get_rights_and_owner() {
     local ans